METFORMIN Question

Kaitlin • Married 4-21-18 32yo TTC #1 PCOS

Hey y’all so I am supposed to start LETROZOLE 2.5 CD 5-9 when my next period comes - the only bummer is that my last cycle was 80 days long. They just put me on METFORMIN on Monday and I was wondering if this would make my cycles shorter or if anyone got success with these two together? Thank you :)