AF due 12/21

I had my IUD taken out on 11/16, started bleeding heavy 11/20-11/22. I started doing ovulation tests and got peak fertility 12/6. I had 3 days of light bleeding/brown discharge 12/1-12-3. So far BFN for pregnancy tests and still getting a faint line on ovulation tests but digital ovulation tests are negative! If AF was 12/1-12/3 than I should of been ovulating this past week and may have missed my opportunity but still got peak fertility on 12/6! Any opinions or advice are greatly appreciated!!