3 days late. BFN. VERY faint watery pink spotting

brooke

help. has anyone dealt with this? AF is never late. late month was the first time she was late by a day but as of tomorrow i’m going on almost 4. no real cramping or usual symptoms. TMI but when I was using the bathroom I checked with toilet paper and I’m very fainting spotting but this was after unprotected sex. it’s not red but light watery pink. Checked 25 min. later and nothing. help?