My period is twelve days late, but I went off of birth control last month. My fiancé and I had unprotected sex during my most fertile days, and after, but all but one of the tests that I took said negative. Even the positive test had a faint line. I've been nauseous, moody, dizzy, my blood pressure is up, my boobs are sore, I get nauseous when I eat foods that I like, and chow down on foods that I don't, I'm hungry more often, I have to go to the bathroom more often, and I have only had light cramping. I haven't tested in about a week. Even the digital test was negative. What should I do?