Ugh...

So im in the last two weeks of school before I start my Externship at the IHC hospital in Tremonton in the Family Practice area. I wish I could be more excited about this but Im SO stressed out and my mood and my attitude have been absolutely horrible lately! I have so much schoolwork left and I feel like i'm getting nothing done at school. Racing thoughts of "What if I don't finish on time?" and "What if I don't pass my final test?" and "What if I don't pass off my final skills?" ...I think about these things CONSTANTLY. I have to do everything perfectly at school in order to be completely done by mid-January. And then I leave for China like two weeks later! If I mess up at all then Im pretty much screwed. Then I start thinking about China: "What if I dont get my visa on time?" and since I have to fly alone and figure stuff out all on my own, "what if I get lost?" and "Am I going to have enough money?"... And I finally got sick and tired of being sick and tired (cold symptoms for two months!) and so I went to the doctors and he gave me Augmentin to try and help me get feeling better. My cold symptoms are FINALLY starting to go away, but now I feel nauseous constantly! I'm a bundle of stress and Im sure ive been hard to be around cuz of my rotten mood. I just keep thinking that a month from now I'll be in a much better place and a lot less stressed (well, hopefully) and so I just gotta take it one day at a time. Also, I get my Patriarchal blessing this Sunday after church! I'm pretty excited and im sure that will help out a lot. Anyone have any suggestions on how to manage my stress/life better?