I went through the same thing (and since I am still in school I guess it will continue lol) but I found that friends are valuable study buddies. I kept saying no to them about having a girls nite out and one friend suggested that we all get together...
Follow the mandated precautions... You should be fine. I understand how you feel though because while pregnant my first semester I came in contact with radiation, etc. I was scared to death everytime I walked into a room. I suppose it is something ...