Do I still have a chance?

I am 15 DPO today but I tested at 13 DPO and got a BFN. Haven’t tested again and period is due today 9/07 but didn’t show up. I am afraid of testing because another BFN would really hit hard. I was diagnosed with right sided PCOS and doctor says I can still ovulate normally with the left. I just hope I am not having a missed period.

Is it possible to have high temps and not be pregnant? Truly confusing.

P.S I missed temping some days because I couldn’t sleep.