TTC first little one

Brittany

Me and my husband are TTC our first. I got my non hormonal iud removed sep 12. We BD the 12,13,15 and 16. Ovulation was the 12/13. I have been so incredibly nauseous lately, I have taken two test sep 17&18 with BFN. AF is supposed to come the26 or 27 of September. Is it too early for a blood test? Or should I wait?