Hi...I can sort of understand your dilemma. I have a sort of hypochondria as well, only mine is with mental illnesses. (LOL.) The fact is, I have some issues, and I just keep searching for answers (the doc tells me it's mild OCD and severe anxiety), but the OCD makes me convinced that I have any given mental disorder that I read about on the internet. Of course, we all have our quirks, but I am easily convinced that from one month to the next I have a different disorder.
I know our hypochondrias are different, but in my experience, it helps me to *stay away from the internet* and to just ride out the obsession. I'll go for about a month believing I have something, and then, suddenly, it becomes clear to me that I'm way out in left field and I just forget about it.
I guess just try to take that excess energy/anxiety and, instead of worrying about yourself, try to use it in a positive way....like, working on grades or other forms of self-improvement. I know that's a lot easier said than done.
I'm sorry I can't offer more help...The best way I've found to deal with it is to just wait and let it pass. Maybe others here will have some good advice for both of us.