Progesterone levels, help!!

So

Sorry in advance for the long post.

My labs:

4/15 HCG 18, progesterone 9.6.

4/17 HCG-67, hydroxyporogesterone-238 (it is absolutely beyond me why they would test the MAN-MADE progesterone versus the progesterone serum, but anyway.

4/24 (yesterday) HCG-920, progesterone 7.9

I had to call their office often and leave messages almost every other day to even get any results, even with an online patient portal.🤦🏽‍♀️

The doctor has finally prescribed 200mg Prometrium (progesterone) orally.

I’m wondering if the oral will work or if I should bug about getting the vaginal suppositories? Endometrin vs Prometrium?

I’m calculating I am 5 weeks based on my O day.