I had unprotected sex in August and I took the morning after pill 12 hours later. I haven't had any symptoms of pregnancy since and have had periods every month since. During my period in the last week I have experienced severe bloating in my stomach (which I don't usually get during my period). I know it sounds silly when I talk about my period and question pregnancy but I know that some women experience something called implamantation bleeding. Any comments would be really useful. Thanks