How to tell my ob/gyn?

My progesterone levels dropped, but hcg went up nicely. My ob/gyn refused me to prescribe progesterone pills because she doesn't believe in them since the chance it will help is small. It gave me anxiety because I didn't want to take that chance. Later I couldn't reach her. My GP told me it definitely doesn't hurt to try and give a little piece if mind. Right now I have less ceamping, GP said it is great since progesterone helps to soothe uterus.

Now, on 25th I have an appointment with my ob/gyn who is actually good DR. How the hell I am going to tell her I went behind her back?

Right now I don't want to reschedule with another DR since all the vacations take so long to get an appointment.