My advice is to stop having unprotected sex so that you won't have even the slightest chance of becoming pregnant and exposing a fetus to your meds. Seriously, if you don't want a baby right now, then don't have unprotected sex. I could go on, but I guess you know the rest of the speech. Anyways, if you're worried about your fertility then go see a doctor about it to ease your mind. I'm guessing your OB/GYN can help you with that.

Good luck in the fertility department!!