Am I still in with a chance??

I am currently 15 dpo CD 32. Normal cycles are 28/29 days. I took a Wondfo HCG test yesterday and it was BFN. My temps started to go down so thought for sure AF would arrive, but nothing yet. I don’t have any signs AF is about to arrive. But I also don’t have any pregnancy symptoms. The only thing I’m getting is lower back pain, I’m completely off my morning coffee and I’m overly emotional. My chart is below. Do you think I’m still in with a chance even if I had a BFN yesterday?