9 or 10 dpo

I got a barely visible line yesterday on a FRER. I got a slightly darker but still very faint line this morning. Fertility Friend is saying I’m 10 dpo today but I think I’m only 9 based on cervical mucous, position, and temps. I just had a miscarriage last month at 6.5 weeks and I’m very afraid this could be a chemical pregnancy. Anyone have any insight as to ovulation day? Do these tests look ok?

Yesterday’s Test:

This morning test. Taken approximately 22 hours apart:

Thank you!