Hi, Erin, I'm sorry the answers have been slow in coming - both from your doctors and here. Personally I have been feeling too wierd in my head to answer much and have also been glued to the Winter Olympics - a passion I picked up as a child. They are now over, and I will try to be a better presence here on the forum.
It is inconceivable to me that you have gone twenty years with these complaints and have not been sent to a neurologist nor had any MRIs. Your symptoms scream for this to be done. Since they started in your early twenties, I can only imagine that your doctors dismissed them as a "woman's emotional stress or imaginings".
While no one here can diagnose MS I can certainly talk about your problems in the context of MS.
Your first and worst symptom is the weakness and exhaustion in your arms. This can be seen with MS, but generally the legs develop more problems first. This is NOT a rule. MS will follow NO rules religiously. How long do these episodes of weakness and neck pain last? For this symptom alone you should have received an MRI of the cervical spine. I'm surious, are the tendon reflexes in your arms normal? Or are they absent or hyperactive?
The vertigo is a very common symptom in MS. However, it is also one of the most common symptoms that all primary care physicians, ENT specialists and neurologists see. When the episodes became recurrent it should have prompted an evaluation by either an ENT specialist or a neurologist.
The Trigeminal Neuralgia is also very common in MS. However, it is relatively uncommon under the age of 50 in the normal population. It's appearance in a woman in her 30's should have brought up the concern regarding MS, and should have sparked the desire for an MRI of the brainstem (which is done at the same time as one for the brain). Tegretol is the firstline drug recommended for it. You say it helped. That's good. Have you needed to keep taking it or were you able to stop it eventually?
The next flurry of symptoms is looking more and more like a central nervous system demyelinating disease - of which MS is by far the most common - especially in your ethnicity, which I presume is Irish. One of the risk factors for MS is young adults of Northern European heritage.
The mind fog and poor memory is common to many of the autoimmune disorders, MS, Firbromyalgia, ME - plus anemia and thyroid problems. You have had some of the work up for these.
The sudden arm and leg jerking sounds like either Myoclonus or Hemi-Ballism. Both of these are movement disorders. Movement disorders of all types are common in MS. For more info on these you can look at my favorite site for discussion of all the major movement disorders:
wemove.org
Hmmm, we are seeing a pattern here. Apparently your doctors are not. :((
The pain and odd sensations felt here and there, like the sensation of cold water being splashed on your hip are classic paresthesias. These are "wrong" signals being sent from sensory nerves. The pain under your arm sounds like nerve pain. Nerve pain is a wrong signal telling the brain there is pain somewhere, but that area is not damaged and shouldn't be hurting. We have two Health Pages on these topics that you can read:
http://www.medhelp.org/health_pages/Multiple-Sclerosis/Paresthesias---Things-That-Go-BUZZ-in-the-Night/show/378?cid=36
http://www.medhelp.org/health_pages/Multiple-Sclerosis/Nerve-Neuropathic-Pain---A-Primer/show/371?cid=36
You eye pain and blurred vision again should spark concern in your doctor. Our vision is precious and not to be ignored when there are problems. You should see at least an ophthalmologist and preferably a neuro-ophthalmologist to be checked for optic neuritis, one of the most common symptoms in MS. One of the tests that should be done for this is an MRI of the brain with MS Protocol and focus on the optic nerves. Optic neuritis can occur alone, but should bring the need to rule-out MS to the doctor's mind. Be aware that the physical exam (where they look into the back of the eye) can be normal in over 60% of people whith confirmed optic neuritis. The diagnosis is then made using other tests than just the physical exam.
Okay, I'm sure you are getting the drift here. You have had multiple episodes of neurologic symptoms pointing to a very wide range of areas of the central nervous system. The diagnosis of MS - the most common kind, Relapsing Remitting MS - starts by requiring two or more attacks and damage to the nervous system in two or more areas. You have that as a "slam dunk." Basketball slang for easy answer.
It also requires that you be given a thorough, head-to-toe neurologic exam to see if there is visible evidence of damage. This usually requires a referral to a neurologist.
The third most important part to the diagnosis is that you need a thorough look for all the more reasonable "other" answers to why you have these symptoms, like autoimmune diseases, infections, deficiencies, thyroid problems, and others. This must be done before ANYONE can get an MS diagnosis.
The MRIs of your brain and full spinal cord should have been done long ago, and if they didn't show lesions should have been repeated and repeated.
If all the stuff above didn't give an answer then you need a spinal tap to look for MS evidence there.
It sounds to me like each symptom you have had was looked at - or not - as a separate problem and that no doctor ever put all the pieces together. This has now become mandatory.
If you have a good relationship with your doctor then you might have him/her read this whole thread, including your posts which put all of the problems through the years in one place.
Right now you need a referral to a Neurology Consultant, preferably one very skilled in MS. And you need MRIs of your brain, and full spinal cord on the most powerful MRI machine in your region. You also need an ophthalmologic eval NOW!
I hope this helps. Keeps asking questions. I see that you are in Ireland, and I fear you might be the victim of health care rationing, but you need to be proactive, get the concern of your GP behind you and move on this.
Welcome again,
Quix, MD