i have an average 30 day cycle. sept 12 is my LMC. Suppsosed to get period on 13 or 15. On the 15 i had one random streak of brown cm. On the 16rth at 7pm when i had a bm after i wiped it was a bright red blood , def vaginal. then nothing. Today only brown spotting after i wipe, nothing on liner. Feels like AF is coming, could i be pregnant. i think i ovulated on the 27-29 but could i have ovulated later? i tested negative on sept 12 and 16.