the chances that I'm preggo? We always use a condom, but lately when we are fooling around like, about to do it, it slips in a couple times? and i'm never usually worried because i've been on birth control for years. The condom comes from me always being worried, but people keep telling me not to worry about it and are so surpised i never do it without a condom. But yeah, we did it and then about 3 days later i started taking amoxicillin for a cold, and it says it makes bc uneffective, could I be pregnant?