ok thursday march21,2013 i had unprotected sex n on da 23rd of march i had sex again but after sex dat time i started bleeding but da nxt mornin i woke up wit a pink discharge it only lasted one day my period isnt do until april4 i read on da internet bout implantion bleeding could dat b wats goin on wit me i never been preggo b4 so please help i forgot i was on antibtic could they cause a pink discharge thanks 4 ur comments