having trouble

So I'm been having trouble getting pregnant I weigh 240 pounds I gained all this waight really fast and mest me up I been off depo shot 2 years I have not got my periods regularly in a while drs took blood work for diabetes and a hormon and for somethings else any one can suggest anything else to me? Dr also put me on metphormin to regulate my periods I beeen taking it a week now and I started getting bloody/clear discharge so I'm hoping I start I was getting a period every few months on 22nd but before I was irregular I was getting it regular on the 11th I have not started it is now the 1st of may so I'm hoping I start on the 11th since I started metphormin any advice or suggestions