I think im about 16 dpo and two days late for AF. Yesterday I tested and had a bfn. Last night I started with terrible cramps, which is normal for me. I have endometriosis. But then it got really really bad. Hyperventilating at times, felt like I was in labor, worse even. Still terribly sore inside. Now even my skin all over aches and I had a slight temp. Can’t move except to hobble to the bathroom. Not sure if im sick now or just really bad endo. Im highly doubtful im pregnant. Anyone go through similar?