BFN 11dpo - when do I stop progesterone

Je

These are my tests from 10 (FRER)and 11dpo (wondfo)

Both negative. I take 200mg progesterone twice a day so I have to stop it to get my period.

This cycle we upped clomid from 50mg to 150mg. Cd3-7

Next cycle switching to letrozole.

If I’m out I’m out and just want to start my period so I can try again but also don’t want to stop if there’s a chance and ruin anything.

About what dpo should I stop the progesterone?

I was thinking to take it tonight and see the test tomorrow at 12dpo. If negative then stop it tomorrow night.

Any insights?