I've been on BC for a long time and this is my first time TTC. My first month off my Af started the exact date glow said I should. This month I have yet to start. Glow said I should have started Monday. I think my average cycle is 30 days but this is day 37 so I'm trying to figure out how late I am. I thought I was only 3 days late but shouldn't it be more than that? All 3 home pregnancy tests have said negative. Any ideas?