2 nights ago I had unprotected sex while drunk. I am on the pill but I haven't been on it for more than 2-3 weeks. My friend told me I should take a day after pill so I did take one yesterday. I'm only 16 and super worried I might be pregnant because I think my period was supposed to start yesterday but it didn't. Also another friend told me if I bleed after sex that means I'm pregnant. Is that true? It was my first time so I think that's why I bled a little bit. Could someone please tell me what I should do?? And should I be worried that I'm pregnant???