i had (unprotected) sex over the weekend with my new Bf and i bled for the first tim , but i wasnt the first time i had sex, but it was his first time. so far I've only had 2 sex partners (including my now bf) the bleeding isn't dark, its more like spotting. i don't know if i bled because my BF is Thicker/Longer than my ex bf or if it's something more serious. i've also had some lower abdominal pain along with the bleeding/spotting . but i've never had this problem before with my last partner.