TTC. Am I out this cycle?

Hi! TTC and have confirmed ovulation this month. Currently DPO 11 and pdg have dropped from 17.71 to 9.21. Negative hcg test on DPO 10.
Hanging in there coz I still have breast tenderness which was my first sign on my first pregnancy.
Anyone had the same pattern and still tested positive later on? 🙏