When will bleeding start after stopping progesterone?

I found out today that I am most likely miscarrying. My test lines never darkened. Positive digital a week ago, and negative today. Barely there line on pregnancy test at the doctor’s offic today. I Had hcg drawn today, and waiting to hear the numbers before doctor gives the go ahead to stop progesterone. If you experienced something similar how soon after stopping progesterone did bleeding start for you? I am dreading the bleeding. The mind has a way of tricking you into thinking “oh this isn’t happening”, but seeing the bleeding makes it real. I really am losing this baby.