My girlfriend and I are not sexually active yet but got a bit carried away and were dry humping.It got to the point where I was in my boxers, kind of wet and for a moment we were rubbing against each other.It was the day before her period, which she got the next day.Now 31 days later she got her period on the 1st by today(5th) her period is pretty much gone and a bit different in color.Would that be imolantation bleeding? really scared here, so any help is welcome.We are both 19...