I got my period on sept 10th. It only lasted 3 days. I had unprotected sex on the 15th (but he pulled out) I also had unprotected sex on october 1st, and second, where the guy did not pull out. I've been feeling nauseous since october 4th. Here's the thing, I got my period early in september. I almost always get it faithfully every month around the 17th. the week of september 27th-october first I had a lot of discharge down there. not sure if that was me ovulating or not. If I were pregnant when might it have occured? too soon to be feeling nauseous? please help. I'm very worried because the guy from the 15th is a different guy then the one from october 1st and 2nd.