I have been dealing with a great amount of stress lately. On top of finals in college, my car breaking down, and my health situation I have been breaking under the pressure. I am currently seeing a doctor about my low blood pressure that drops dramatically when I am on my feet. I did a table tilt test last Thursday and I fainted immediately showing that something is definitely going wrong. They diagnosed it as neurocardiogenic syncope. Since that test I have not been able to bounce back. I have been collapsing frequently (close to fainting), having migraines, and I have been displaying jerking motions in my arms and legs that I cannot control. I feel like I'm having chills or electric shocks go through my entire body again and again. I went to the doctor yesterday (a general practitioner because I'm away from my normal specialist) and he said that he thought that the jerking was due to stress. Now I have it in my head that this is all something I'm making up and that it only happens when I think of the muscles... but I can't stop! I feel so much overwhelming guilt - like this is all in my head and I am lying to those around me. I sincerely feel that I cannot control myself once I collapse and start shaking/jerking. Can this all really be in my head? Thanks for any advice and help.

P.S. My father (I'm 22) says that my fears are irrational and that I am a hypochondriac of being a hypochondriac. I'm always afraid that people are thinking I'm making it up. Sometimes I get so convinced it's all in my head that I let the condition get really bad (e.g. I refused to go in for kidney stones thinking it was all in my head - I went in a week later it turned out I had 6) Odd I know.. but I thought it should be noted.