I had unprotected sex with my boyfriend the last day

Patient: I had unprotected sex with my boyfriend the last day of my period no semen or cum was present but due to my fear of pre cum I took an emergency contraceptive 12-13 hours after wards. 6 days later I started to get a heavy brown and red discharge with some clumps of tissue which lasted for 6 days, then for the following 2 weeks I had a dark brown discharge. I am now a few days late for my period but understand plan b can disturb the menstrual cycle. What course of action should I follow?

Doctor: