Hello, Me and my husband had an unprotected act on the 13 day after my 1st period day. He did not ejaculate in me, but fearing precum. So I took plan B after 36 hours just to be safe. It s been 4 days after taking the pill, had headache on the 1st day and now severe bloating and gas. Also I have gained 2 pounds. Does this mean plan B is working and showing these side effects or it could be a pregnancy situation. Considering that I had last period on 21st Jan, unprotected sex on 5th Feb, pill on 6th Feb, when should I do the test for pregnancy? My periods should come on the 19th Feb, if I was not in this situation!