Define heavily!?!? Bleeding can be normal.. But only if its your first time.. But if your doing it like forever.. Then something is wrong with you.. Unless.. Its your period..
My girlfriend was having sex with me and she was kinda doing it too hard, and after we were done she bleed, and she not near her period and this is the first time this happened, should we worry what might this be?
Yes you can and it is not healthy to do that, because it will hurt you later in life, you will have some many female problems, it's okay once and a while but not all the time, you are the one who's going to be hurting when it's over also later in life, be careful.