I Have Watery Discharge, It Happened When My Sexual Partner

I have watery discharge, it happened when my sexual partner pulled out after finishing. Then right then I got my period. I didn't want to get pregnant so I still got a morning after pill. He also had a marble sized ball inside of his penis. Did I bleed because I was almost due for my period? Was the marble what made me bleed? And why did I have water coming out of me???