Do I go on letrozole?

An

My GP has suggested putting me on Lerozole as suspects I may have pcos due to high amh levels until I get referred to a fertility specialist pending testorone blood test. She said she has not dealt with a lot of pcos cases and letrozole. She thinks this may be more helpful that metformin. Do I trust her to go on this or should i wait to see a fertility expert which may take some time?