Sleeping on your stomach?

Ki

Ok I read a while ago that women were still sleeping on their stomachs throughout their 1st trimester just until it was no longer comfortable and that it isn’t harmful to the baby? I haven’t been able to ask my doctor yet and have been sleeping in small increments on my stomach still at almost 9 weeks. Does anyone know if this is harmful to the baby? After 2 miscarriages I’m paranoid