Progesterone!

I have been taking progesterone suppository supplements every night and have to stop taking them Wednesday because I will be 12 weeks…. I know the placenta takes over at this point but I’m so nervous because I have had 4 miscarriages before this and just feel like it has been the staple to my pregnancy, has anyone else went through this fear? Has anyone experienced withdrawal bleeding from stopping (I know I’ll have a heart attack if I see blood from past trauma) I just need some encouraging words and reassurance plz and thank you to anyone that took the time out to read all of this, I have high anxiety and not very many people to talk to about everything.