Birth control removel

I had the birth control that goes in your arm I had it remove Aug,23 last month and I just came off my period so close to my ovulation I started bleeding a little but days before that me and my boyfriend had sex and we have sex every day and he been nutting in me like crazy after that I stop bleeding my period is due this month on the 20th but I don't know cause we been having sex a lot and he been nutting in me all the way up until now I really do need help. And this will be my second child if I am pergnant