I got my period for about 1 1/2 weeks straight then I got off right after that I had intercourse but a condom was used, before that me and my ex boyfriend always had sex but never used one. I'm on birth control and I'm have brown discharge since I got off my period I don't know if it's implantation bleeding or just brown discharge, and I've had bloating for 2 days now and I don't know if that's a sign of pregnancy or something else. And then one night while driving I had to pull over on the side of the road to throw up I don't know what caused it but I'm worried and I don't know what to do
This is far from a typical pregnancy story. As long as you have been taking birth control pills religiously the chance of pregnancy is very low. Something else could be causing your signs - a cyst maybe. Run a couple of home pregnancy tests at one week intervals to eliminate that possibility, then get your obgyn to check for other reasons.