My last normal period was 6/19-6/21. We had unprotected sex (we re TTC) on 7/3, 7/5, 7/6, and 7/9. I got my period 3 days early (very abnormal for me, usually it s on time or late by a few days). It was darker than usual, not as heavy but still heavier than spotting. 2 days after my period ended, I had brown/dark red discharge, which I ve never gotten before. I had weird muscle spasms in my uterus for 5 days, on and off throughout the day. I m always extremely hungry, my lower back is sore/achy (like when you overwork a muscle), and I ll randomly get nauseous throughout the day. And yet I ve taken 2 HPTs and they ve been negative. Any ideas??