March 22 my boyfriend and I decided TTC we had sex on all of my fertile days. I felt as though he was changing his mind about the idea so we just stopped trying. My period isn't due until Saturday. I have been experiencing some cramping, a lot of fatigue but for the past two days the nausea has been unbearable. I know they say a woman just knows and I should know my body but I've never been pregnant so I can't really go by that. Any ideas what's going on??