this happens to me everytime i have sex too. it exspecially hurts if its the time of the month when im really (dryed out) and it takes sum getting used to. the bleeding may be caused by a tear in the vagina. expecially if he used his finger inside u?
actually I believe that would be your cervix and the smaller your vagina is the more common it will be that men hit it. I would try a different position. also you may have health problems like cysts that can cause pain during intercourse. I would see a doctor to rule out that and infections/std's.
It happens to me and I have no health problems my husband will hit my cervix during certain times of the month or positions and well just change up till it feels better. I also spot when this happens to me I have been checked out so Im fine but id rule out anything else for your own health good luck :)
Please tell whether it was your first intercourse? Then it's quite normal. Or may be your boyfriend extra big (more than 8 inches long) then it may take you to some pain and bleeding.