Pregnant & symptoms after a few days?!? Had sex on Saturday and started having funny feelings in my uterus Thursday.I am on the birth control which i take religiously. I'm experiencing a little bit of nausea, heartburn, not sleeping well, having some weird sensations happening in my uterus similar to the chills ....peeing a bit more frequently was constipated a few days ago and had diarrhea yesterday.......I started ovulating Thursday and my period is not due for another two weeks...what do you think?