Weirdest cycle ever.  AF was 2 days late.   BF negative up until that day.  AF started on Friday and ended Sunday.  I am consistently 4-5 days with at least 2 days over heavy flow.   Like a super tampon every 3-4 hours.  This cycle I never even filled a light tampon in 8 hours.   I bled a lot with my first pregnancy.   I am starting to wonder if this was just breakthrough bleeding and implantation was just late but I am too scared to test.   Thoughts?