Testing - DPO

I'm 8DPO & tested this morning, got a BFN & I know it's still super early but I feel so sad already. Think I'm out for this month, just don't have any positive vibes and just feel really down :(. Glow is telling me AF is due 18/09 & Ovia is telling me it's due 16/09. Hoping the wench doesn't show at all but has anyone found the app is out at all?
Who would have though TTC would be so hard & frustrating?!