After having unprotected sex with my boyfriend, took plan B two days later. After about a week, my "period" showed up then ended 5 days later. Somehow, I ended up getting ANOTHER period a week after that one. Now, a month and a half after the fact, I have missed my scheduled period, yet have what seems like the symptoms of when my period feels like it's about to arrive. Cramping, hunger, emotional. I have taken two pregnancy tests and they have both come back negative. I have had sex since but it was protected every time. Is it just the pill that has messed up my cycle? Wouldn't the test have showed up by now if I was? It's been about a week or two since having protected sex so wouldn't the tests be accurate by now? They were first response and those seem to be a good brand to use. Help please!!