I understand your worry. I feel that way too sometimes, especially about MRSA.
I have a little story about C. diff. It was my first semester of nursing school
, and we had just started our rotation on a med-surg floor. My patient had C. diff and was using a bedside commode. She asked me to empty it for her, and my instructor told me I should take it down the hall and dispose of it in the hopper. And I asked my instructor "So I'm just supposed to carry it down the hall? Just like that?" And she looked at me sympathetically, and said "yes." So I took the pan out of the bedside commode and proceeded down the hall with the tray of poop wafting in my face as I walked past visitors and staff. It just seemed so wrong, but that's what I was told to do. I did that several times that day and I was SURE I would get C. diff. I was about 8 weeks pregnant at the time. I was fine, though, never got sick.
Later that week I was talking to my mom, who is an RN, and I told her about this experience. She was horrified and said "Cover it up with a towel or something! You're not supposed to do it like that!" Well I felt stupid I didn't think of that. I'm in my third semester now and have been exposed to a lot of things, and the only times I've been sick, I've caught it from my son who is in daycare.
Try not to let the "germ anxiety" consume you. Luckily no one will think you are crazy if you are constantly washing your hands.