HELPPP

so i had sex with my boyfriend and the next day i noticed i was bleeding when i was peeing which is completely normal. i took a shower and felt that my stomach was hurting i thought it would be smart to put a pad on just in case and 5 minutes later i felt  stuff come out as if it was my period. i keep bleeding as if i'm on my period heavy very heavy. is this normal? is this my period? please comment and help me