I am glad that you have found our forum. What type of doctor is currently treating your symptoms? If you haven't been to see a Rheumatologist who is well versed in diagnosing and treating Fibromyalgia, I would consider doing so. If you are in the US, (which I didn't notice from your profile) you can go to the National Fibromyalgia Association's website:
They have a directory of Rheumatologist who are willing and able to make the diagnosis. There is a free sign up and registration however, but it is definitely worth it. There is a lot of very good information there.
If you are not in the US and you are only under the care of your primary care doctor, I would suggest asking for a referral to see a Rheumatologist. There is a chance, from your symptoms that you are suffering from Fibromyalgia, but FMS always mimics other more dangerous arthritic conditions, so it's best you have them ruled out anyways.
I would strongly urge you to convince your doctor to take your symptoms seriously as they are causing you incredible distress and are interfering with the quality of your life. You might want to mention that you are concerned that your symptoms could be progressive and want someone to do the proper testing, send you to a specialist (the Rheumatologist) as a precaution. They owe this to you. Good luck to you.