I need some advice please.

I'm ttc baby #3 so me & my husband bd all through my fertile week . Now this month glow said I was due for my AF on the 7th but nothing showed up so it recalculated it to the 9th and nothing then glow said today and nothing. I got my period on 9/9 so technically I'm late. I took a pregnancy  test today and it was negative . My question is should I count my self out or can the test be wrong?