Metformin Hydrochloride and heart

In 2007 I was diagnosed with type 2 diabetes. My doctor prescribed 500mg of metformin once in the morning and once in the evening with meals and lots of water. The meds made me drowsy all the time my heart began to beat irregular and I was cold a lot. At night was the worst because when I lay down my heart really beat irregular. I told my doctor after about a week and all she could say is that the metformin doesn't do that to your heart. My answer to her was I 'm not taking the meds any more. I found me another doctor who listens. I went on the internet and found out about the side effect I had they were serious. Listen people you need to be your own advocate no one knows your body as well as you if something don't feel right question it and seek answers. Doctors are not always right pride is no reason to not hear what some one is saying if I say something is wrong and you are a doctor at least hear me and check it out if you don't know the answer it ok you are only human.

If someone can answer this question for me that would be very appreciated.

1. Does this med cause weight gain?
2. Does this Poloystic Hormon Syndrome ever cure, does is cause infertility?
I'm trying to have a child, and i'm concerned about that issue.

The only side affect i have was diarrhea.....It hasn't continued, but sometimes a little gas.