Cycle Buddy using RE for help

Hi my name is Nell AF is due to show at the end of June/beginning of July.  I have been TTC for six months and I'm currently on Metformin and Letrozole prescribed by my RE in hopes to regulate my cycle and cause ovulation.  I'm becoming discouraged because my first cycle lasted 20 days with no positive opk or EWCM.  This cycle seems to be shaping up the same.  I would love a cycle buddy that share some similarities.