Too early to take a pregnancy test; What can I do to stop worrying?!?

I know you are worried, but you just have to relax. You have done everything you can do at this point (obviously I don't need to tell you that in the future you should plan ahead better and get on birth control). Plan B is pretty effective, so you just have to trust that it worked, even if you were on antibiotics. And even if you do end up pregnant, you do have options. No one is telling you that you have to give up your life to be a mom, although if you do choose that, I promise you won't regret it. Children are amazing. Right now you should just spend time doing something that will get your mind off of it.