Short luteal Phase?

Mikhala • Been ttc for over a year now. One chemical pregnancy, one miscarriage. PCOS. Started metformin 1/23 BFP 2/22!
So I've been charging for four months now and my luteal phase is definitely short. Like 8-10 days tops. 
I tried going to my PCM last month, because I've had a bunch of other issues including weight gain/no weight loss with a strict excercise and nutrition plan, long cycles, and just overall "weird" stuff for me, and she didn't order ANY hormone tests. 
Do I need to be more specific? Is this something a doc will treat even though we haven't been trying long?
I'm pretty frustrated :(