Bleeding After Period. Help!?

Bleeding after period. HELP!?
I got my period July 20 and I usually get it either the very last days of the month or the very first days of the next month (so if my last period I got in May 30, than my next one I get either the very last days of June of first days of July). The day before the 20th, I had sex with my boyfriend on the roof of my house and after we were done he threw the condom on the floor. He later than picked up the condom and checked to see if it had any holes on it, it turned out that there was a almost non existint hole there that water can only come if you squeeze the condom and there only water would come out and drip to the bottom of the condom on the outside. So we were a little worried but we remembered that the floor on the roof has a lot of rocks and it had glued to the floor when he tried to pick it up so it’s obvious that the hole could have happened when it thrown to the floor and later picked up and was attached to the floor. Anyway, on Friday the 23rd, all day in the morning and afternoon but than at night of that same day my boyfriend and I had sex, and while we were having sex he noticed that there was some blood on the condom, now it wasn’t completely covered like a horror movie but there was definetly blood on it and I checked and my inner thighs and the area around my vagina had blood. I was completely shocked because I thought that my period was over with but than I saw that so it was surprising. Three things came to our heads, either I was still on my period and/or it was just period blood, or I received a cut or something like that because my boyfriend fingered me while we were having sex quite a few times, or that I was pregnant because I read that sometimes when you get pregnant you bleed a little. But the amount of blood was about the amount of blood you get on your fourth day of your period. And the next day Saturday, I just had a extremely low amount of blood, like drops you can say. Oh and this time I got my period, it really hurt the first day, and the time prior or two times prior to this one it didn’t hurt that bad.
So, can anyone please help me!? What do you think this is? should I be worried? what should I do?
Please help, I so desperately want to know.
Thank you so much.