Prog 15.4, do I need supplement?

I had a MC earlier this year and I just found out I am pregnant with my 🌈 baby 💕. I need some advice coz my OB said I should be okay by just taking my prenatal vitamins.

I had my bldwork check for progesterone after ovulation and the result is 15.4... Do i have to call my OB Back since i’m anxious about miscarriage but at the same time I don’t want her to feel that I don’t trust her.

The posts im reading about progesterone is that it can help with pregnancy esp those who had MC.

Is the cream helpful too? When did you guys see your OB after a positive hpt? Thanks xoxoxo