Is it normal to have a heavy bleeding when having a first time sex?

Hymen rupture: If bleeding if bright red red and gushing go to the ER; hoever a moderate amount of blood which diminshes over 1-2 days is common after losing your virginity. If in doubt I suggest GYN exam.

Bleeding: Hi, no, a slight bleeding with subsequent spotting for couple of days are ok but heavy bleeding could be 2/2 trauma and tear in the vaginal wall, please see a Gynecologist. Be safe.