pcos help

Mariah

I've been disgnoised with pcos like two months ago I started taking metiform august 18 2017 500 mg twice a day for a week then 3 a day I haven't felt any changes . I'm fat I can't lose the weight I weigh 220 now ng its killing me I'm trying to have a kid with my boyfriend of four years any advice i dont know what to expect from this ?