Anxiety about stopping progesterone

I've been on 200 mg oral progesterone for the past 10 weeks due to two previous miscarriages. I'm 13 weeks today, and supposed to stop taking the progesterone at 13 weeks. I know the placenta should have taken over by now, but I'm just so incredibly nervous about stopping. I found out I'm having a girl already, which after 2 boys I'm beyond ecstatic about! And I was starting to show too much, so I've already announced it publicly as well. I'm just so nervous that stopping the progesterone is going to mess everything up. Any positive stories about ending progesterone at or before 13 weeks? Thank you!