Progesterone Serum Test

Briana • Boy Girl Twins Born July 2018 at 32 Weeks after TTC since June 2015. MFI and APA syndrome. Had 4 IUIs and IVF fresh transfer prior to FET (2 early miscarriages from IUI and fresh transfer)
Got my test tomorrow. So worried that my levels won't be right. We've been trying for a year now. For those who had low levels when you had the test done, what did your doctor do to help get your levels where they need to be? Just want to be prepared in case of bad news.