Hi today is Friday and I have had unprotected sex this past Tuesday. Although it is not my first time I've always felt bad after sexual intercourse previous times. But this time I've experienced being very gassy for about 2 days which was Wednesday and Thursday. I also have experienced loss of appetite and diarrhea which both occurred for me on Thursday which was yesterday. Although we didn't have sex for long he did use the pull out method. I have not vomited nor experienced nausea. I am concerned I really hope that all I read is not true and hope that I am not pregnant.. Can someone please give me a logical reasoning or explanation as to what is going on. And I don't start my period until like the 15-20..and its the 4th of the month