Okay so I missed my pills on the 25th and 26th of lat month and had unprotected sex on the 25th. On the 28th I've started having this black thick discharge which has been off and on every day since, I've also had near constant cramping the last couple days, I have a doctors appointment in five days but I get More and more worried every day. It's also started itching down there... I had thought it was possible implantation bleeding but it's taking too long and cramping too much for that. The only other thing i can think of is a miscarriage of a very early pregnancy but I don't know... Someone help?