Threatened miscarriage

Rebecca
Had another ultrasound today, development is a few days behind and the Heartrate has went from 135 to 95bpm. My dr is putting me on progesterone since my level is low, said it could go either way but I'm not optimistic. I've had 2 other miscarriages in the last year. If it doesn't turn around and is a loss, then I'm on to bigger tests. She thinks I may have a protein disorder. If it's fixable, then I may try 1 more time. If that's not the case and they find nothing, I don't think I can do this again. I have 2 amazing little boys and if they're it for me, I'm good.