When to use digital?

Mercedes • Mom to Silas 9-21-20 💙 one 👼🏻 in the sky 2/8/19.

So yesterday I got my positive tests:

And I can tell my hcg is rising, as today I got a super duper faint on a different brand test that I didn’t yesterday, and the Wondfo seemed a tad darker to me:

When do you think I should be able to use a clearblue digital smart countdown? I’m not exactly sure what dpo I am, as today would be 18 days late for AF but I have PCOS so it’s possible I ovulated way later, and so clue predicted that maybe I ovulated around the 10th of this month, putting me at 13 DPO today.

**UPDATE**

So I waited two days and tested, and: