Low progesterone?? Pcos & short LP

Hey y'all- I have a question... I have thin PCOS - 2 failed IUIs on injectables. We've been on a 6 month break, but I just started pregnitude about 6 weeks ago. It is definitely helping with my cravings, sleep, and I ovulated last cycle! Woohoo! BUT, I still think I have low progesterone. Usually by 10dpo or 11dpo I'm spotting, then start, so a LP of 11 days ish. Is there anything natural I can take to try and lengthen my LP or increase my progesterone at all??

Thanks!