My periods are always very regular and the first day I have AWFUL debilitating cramps... this month after my husband and I had unprotected sex several times during my fertile window I started having pink bleeding one day before expected period. My cramps were there but a 3/10 when normally they are a solid 10/10. The bleeding was much much lighter than normal and only lasted 3 days. It did turn red and did have some clots. I am still currently dizzy, have waves of nausea, increased appetite, and emotional. I took a pregnancy test 2nd day of the bleeding and it was negative.. Thoughts?