ok.....sounds to me like your baked and you are in the middle of a freak out. I really dont understand what you are freaking out about. I think the chances are you are making a huge deal out of nothing. YOu need to just relax and let it go.

sounds like you are trippin about the smell. and you dont want anyone to find out. If they do find out, its probably not going to be to to big of a deal, believe me, my parents found out in a way 1 million times worse than most kids.

if you are worried about the smell in the bathroom, just turn on the fan, run the shower, close the door, get some steam and condensation going, get some colonge or somthing, just be crafty

hope that helps