Bled while have Sex, twice !

Basically me and my partner had sex a month ago and while we were I started bleeding, I didn't bleed after that so it couldn't have been my period. Then a month later after I had decided to start the contrceptive pill everything was fine up until a couple nights ago where I had bled again during sex. The bleeding has gone to very very light spotting since the sex. He is quiet large down there also. I was just wondering if the second time could have been a light period as it is my first since starting the pill?