Is it only Anxiety?

I am only 18 years old and I wish I would not have feelings like this, I start to worry alot when I am home alone. I worry about everything and anything but the worst thing is when I am not feeling good. I will begin to look up possible sicknesses |I have then all these symptoms start to appear and They feel so real... A few years ago I was in and out of emergency 2 or three times over summer holidays for numerous reasons that all come back negative. Thats when my doctor said I may have a slight anxiety problem.

I have not even thought about that until a few weeks ago when I started freaking out about swine flu. Yesterday I went to the doctor because I didn't not want to die from it and he said I have a sinus infection which did make scene with my symptoms and he put me on penicillin...

but I could not sleep last night because my chest hurt... on my left side it was a burning tingling sensation and it went down my arm and into my back and I felt really nauseous from it... is that from my anxiety, from the penicillin or am I really in trouble...?

[fadada]

you know what yur not crazy the same thing happens to me i think of the worst and it seems to happen so relax and i would try to seek so perfeshinal help so all of this will stop cuz if you are anything like me it will drive you nutts then evrybody will yhink the same