So my period is due in 4 days. I had sex frequently during my ovulation time. The past couple of days I've been feeling sick to my stomach and off balance sort of. Like everything starts to spin a little bit, pretty frequently, as if I can't focus. I've also felt like I've been short of breath. Light cramping. And a little heart burn. Sore boobs. Most of these symptoms are not symptoms of my period coming on (except for the sore boobs). I feel very wierd and just off, never have felt like this before. Has anyone else experienced something similar to this and found out they were pregnant?