i bleed everytime my boyfriend and i have sex. my uterus was infected and i went to the dr. he gave me antibiotics and cleared up the infection. he thought i had a syst so i went to get an ultra sound and it came back negative. i just began birth control pills, but the bleeding was occuring before i started birth control. any idea why i keep bleeding? i've been under a lot of stress lately, could that be causing this! thank you for your help.