So I had unprotected sex last week and we didn't use a condom which I know it was stupid and I should not have let that happen. Anyway I took Ella(morning after contraceptive) like an hour after the unprotected sex and my period was due Nov 7th and it started but it was very light and this is the third day on the cycle and now it's like blood with clear, kinda snotty discharge. My periods previous to this for 7 years have always been pretty heavy so I am not sure what's going on. I also just started birth control pills so I was wondering if that could be the cause of this? Lots of changes to my body.