af due on 2/6. feel like I'm out this month!

Tested today and yesterday and that negative is so disappointing. I had my copper (Paraguard ) iud for 6 years, ttc month #3 but I'm feeling really negative thinking I'm out this month and on to month. #4 for my husband and I. Anyone test negative 2 days before af due then end up with a a bfp on day of af due?