Last month I was 8 days late. Once I got my period it was not normal I Had light discolouration for the first day. Day 2 I passed a clot the size of my thumb (was like a string) day 3 very very light bleeding. day 4 more discolouration. Took 3 tests all negative. This month I am currently 4 days late. No cramping or any indication my period is coming. Anyone have any ideas?