We're symtoms(symptoms)

I was wondering if my symtoms (symptoms) could be attributed to a problem with my heart.

I've seen many doctors, from neurologists, endocrinologists, pulmonary specialists, caridoologists and everything.  I've had extensive MRI's of my brain, CT of my chest, abdominal scans, thyroid scans and tons of bloods tests from lymes disease to lupus

Without currently going into a full history of my symtoms (symptoms) my current ones are more so a build of what has been plagueing me for quite sometime.

I have a migrating pressure throughout certain points of my body.  It can occur in my abdomin (abdomen), the center of my upper back around my spine, my chest and the back of my head.  When the pressure migrates to the back of my head, I feel a bit disoriented almost like very small spurts of vertigo that go in and out. I've had these symtoms (symptoms) for quite sometime now, and they seem to increase in severity.  I also experience an irritation in my lower throat, like it is in my esophogus. Its not like a burning sensation, as it is more of a scratchy sort of irritated feeling.  These symtoms (symptoms) can become remissive.  

I'm 22 years old, and under alot of stress with trying to pull through college and these symtoms (symptoms).  I'm just looking for some advice in some sort of direction I should take, or anyone who is experiencing similar symtoms (symptoms) or has for some reassurance.  
Thanks everyone