Period?? Spotting?? Implantation bleeding??

My last period was from the 7th to the 12th February. I had sex on 14th and took the E Pill. On Friday 21st experienced cramps, with bleeding and brown discharge. Then the bleeding stopped but now I still have discharge and it seems to be a lot and I bled today morning and feeling bloated and cramppy. What could be wrong or right? Boobs sore for two weeks.