Don't understand what's going on. I am now 6 days late for AF, but had three negative pregnancy tests a couple days ago. I had brown spotting for 6 days two weeks ago. I thought it was maybe from ovulation or maybe from implantation. I had a positive ovulation test during the appropriate time in my cycle, so im pretty sure I ovulated normally. Any ideas??? I couldn't get a dr. Appt. until September!