I just had my period last week. I am taking birth control and I use a condom, although on the first day of my placebo week we didn't use a condom for the first five minutes because we thought we didn't have one, but then we found one and continued having sex with a condom (He did not cum inside of me at all). The next day, I got my period. Now, a week later I'm feeling a little nauseous. I'm probably just sick, but my paranoia is making me think I'm pregnant. I use the pill perfectly (I take it at the same time every day). What are the chances I'm pregnant?