About a week and a half ago my boyfriend and I had unprotected sex. I am on birth control and didn't miss a pill. He came inside me and just to be safe I took the plan b pill about 9 hours later. Exactly a week after I threw up 4 times but i ate some greasy food the night before so it could've been that but was confused. Now I am experiencing bloating and sometimes lower back pain. Do you think it's from the plan b pill thats making me feel this way? I'm suppose to start my period next week. PLEASE HELP!! I'm scared