On 21aug I was with my partner and we had done unprotected sex, after that I took a dose of I pill at 2pm and at approx 11pm I stared vomiting. Next day at 11pm I took one another dose of I pill. My last period date before intercourse was 06 aug and at 30 aug,got withdrawal bleeding for only one day with very heigh flow, I had to use 3 pads and next day bleeding completely stopped. From that day I still don't get any withdrawal bleeding and there are no sign that I might bleed soon. Could it mean I'm
pregnant?
Please assist me to prevent pregnancy.