is it normal to bleed after sex

I had sex the next day after my period ended (with a new partner, who is much larger then my previous partners) I started bleeding during the second session, and have continued to bleed for the past 3 days, it's very lite bleeding though, it doesn't even go to my panties, but when i urinate and wipe myself i can see the pink fluid on the tissue. I didn't take my birth control pill that following sunday because I thought my period had actually continued. So I don't know what to do now. And what to do about the bleeding too. Thanks

[VirtualDad]

I would suggest a doc visit. Depending on how much bigger he is, he could have done damage to you internally.