"my boyfriend went in me twice and I immediately took this pill about 15 minutes after sex. Only side effect is me being sleepy. I usually get my period a day after my mom and I didn&#039;t I started to panic and buy pregnancy tests. I was soooo stressed! I came on here and read every review.  I swore I was pregnant. so a week after taking the pill I got my period . It was a couple days late though. Don&#039;t get yourself worked up. It works. Stressing will cause period delay. no need to panic :)"