Hello. I am writing for the first time. I am wondering is there anyone here having both thyroid and insulin resistance? I am on T3 medication for 2 years for my thyroid and my life drastically improved on it, however swelling all over my body remained persistent, so recently I did number of test which determined that I have insulin resistance as well and that I am close to diabetes. Just to mention that I am not overweight and most of my weight is coming from water retention. So I am on Glucophage (Metformin) now as well. However, since I started taking it except slight stomach discomfort, which they say it's normal in the beginning, I have tachycardia as well. I don't know why is this happening since it is not mentioned among side effects of Glucophage and it can't be from my T3 since I never had this on it before and I've been on the same dose. It must be from Glucophage but I don't understand why. Can anyone help me please. Thank you.