Condom stuck was stuck in my vagina?

Earlier today I had sex with my boyfriend. We were switching positions and the condom disappeared. We looked for it and didn't find it. About two hours later, I headed home and went to the bathroom. I peed and wiped myself and the condom came out. The ring of the condom was the first thing that came out. It wasn't all the way in my since it came out really easily. I am wondering if there can be any chances of me being pregnant? My period schedule is really messed up. It's supposed to come around the 8th of July or if not around the 10's and sometimes 20's. Is there a possibility of me being pregnant? By the way, he's 20 and I'm 19.