TWW af due July 11-14

I thought af was due July 7 (and it would have been if I was still on bcp) but I'm now cd 31 and testing bfn, no af. I have taken my temps a few times this cycle, and if 0.3 degrees celcius is enough to indicate ovulation it means I ovulated between June 28 and July 1, and due for af between the 11 and 14 with a 14 day lp! So frustrating! I just got a bfn with a dollar store test, bfn with frer on Monday