bleeding during sex?

So I recently lost my virginity to my boyfriend. We've had sex 7 times since. I didn't bleed the first 3 times. Then I started my period so we didn't have sex. It started on Saturday and we had sex that Friday  (I thought I was done) but I ended up bleeding a bit on his sheets.. we had sex the next morning and I didn't really notice any blood and again that night. Again I didn't notice any blood. Then we had sex today (2 days later) and when we were done I got up and I noticed my "lady juices" had a very very light tent to it and there were a few drops of blood also. Should I be worried? I've had pain during sex every time (not awful. It gets less lainful every time (I assume that's normal. He said I am very very tight) so is that normal? Should I still be bleeding even though we've had sex 7 times since then? Thanks in advance.