Am I Pregnant?!?!

I haven't taken a test yet because it's only been 2 days but on the 3rd day of my period my boyfriend and I had sex and he came in me. On that day my period stopped. Usually my periods last 4 days but I didn't think much of it so the next day we had sex again and he came in me again (being as I was still expecting my period). The next day my period started back up again which I thought was weird cuz I thought I was done. However I only bled a little bit. Does this mean that conception occurred?!?!!