I Am A 52 Year Old Female Going Through Menapause.

I am a 52 year old female going through menapause. I am morbidly obese according to my doctor. I am recently experiencing massive sweating and I am thirsty all the time. I have not been diagnosed a diabetic - but my primary care doctor has me taking Metformin twice daily to help with weight loss. (it is not working)I am wondering if the symptoms and my weight may be indicating diabetes.