.. I bleed during a night of hardcore sex with my guy, which I don't experience with other guys.is it only on how the way he pumps it? Or I'm sick? I'm scared to see a doctor.its already bothering me.

It is not uncommon for some women to have some bleeding after rougher than normal sex, or prolonged sex. If it bothers you, consider discussing it with your partner and work out gentler ways of having sex.