Helpsss

So today is Wednesday and on Saturday I had unprotected sex for the first time and I'm on the pill took everyday on time. He didn't finish at all like at all we did it for 10 mins. Today i finsihed the week 1 2 and 3 and tmr is the sugar pill (week 4 and I've been on the pill for2 months) since tmr is the sugar pill means my period should start. I had clear discharge just now almost like I always do before and after my period. But since I had sex does it mean my period or something else I really hope in not pregnant. Help plz