What can cause all this? Please help!

[Christ_Is_King]

I have told several doctors I'm having chronic pain in my cervical spine, along with grinding of bones in my neck, and pressure radiating from the base of my skull, (lower right side of the base, near my hippocampus), up into to my forehead and mu eyeballs. I have had this for at least 5 years, and since it began getting almost unbearable, (about 4 years ago, and no over the counter drugs help anymore), I have had troubling arrhythmias. I have also had this strange difficulty of having to remember to breathe while awake, and while trying to sleep, ever since it got really bad, which naturally causes anxiety, because normally we don't have to think about breathing. I've told several doctors, and they have told me there's no reason to do any scans of my brain and neck. They just don't take me seriously. I have only averaged 4 hours of sleep every 18-24 hours for the last 2 years because of this. I honestly think doctors discriminate against me because I was misdiagnosed with bipolar disorder in 1998, and they just don't seem to listen to me. I can't help but be naturally worried and angry about the way they treat me.
Also, I have been having severe cardiac issues; rapid heart rate upon moving while sleeping, which suddenly brings on shortness of breath, and chest pain, or pressure. These symptoms have not really subsided any in 2 months. They only seem to get worse. I have experienced syncope 4 times in 6 months, gone to the ER, and was given an ECG 12-lead, ED ECG interpretation,  and a chest X-ray. They also did Cardiac Monitoring, Continuous Put Oximetry, and checked the usual vital signs. The lab tests they did were: B-Type Natriuretic Peptide, CBC, CBC with differential, CPM, PT with INR, and Troponin I.
I was diagnosed with Atrial Fibrillation in 2005, and Atrial Tachycardia in 2003, but was told not to worry about them.
I'm very concerned about my health, and I have this feeling of impending doom. I don't normally feel that way at all because I have faith in Jesus, so this is my body telling me something is definitely not right. Don't I have a right to ask for certain tests to be done under the HIPPA act, and by my insurance policy? Because my rights say I have that right, so why aren't doctors listening when I tell them to do an MRI of my neck, and brain-one without nuclear dye, and one without?, And why won't they do further cardiac testing?
What would any of you suggest that I do?
I have researched my symptoms, and they point toward either congestive heart failure, or pulmonary embolism, or deep vein thrombosis.
I have lived with my 2 previous heart conditions for many years, and have NEVER experienced symptoms this severe that won't let up for any reason. I also want to add that just walking 100 yards at a normal pace often is very difficult, and makes me very weak and dizzy. Please help!
I am terrified, and don't know what to do!

[Bicbut]

Could actually be anxiety, anxiety can cause a plethora of horrendous symptoms.  I have anxiety severely. I also have spinal stenosis which causes electric shock type pain.  Start learning to drop breath even mediate and that will help byiur heart rate. If you think an MRI will alleviate your stress tell your Dr this, it may sway him/her to give you one. Good luck