I've been having piv sex for around two months [previously a virgin]. After around the 8th time I stopped bleeding regularly, although the past two times I've had some bleeding again. The first was after having sex two times in a half-hour span [I didn't even notice any blood, my boyfriend did]. The other was just tonight; we had to be very discreet so as not to wake up my family and thus there wasn't any foreplay involved.
Is this normal or something I should be concerned about?