What Causes Weight Gain, Fatigue, Fever And Chest Pain During Menopause?

I am a female 53 years old. Going thru menopause for the last 8 months. During this period I gained 20 lbs, have constant fatigue, bloating, along with low grade fevers off and on, 8 months ago I had chest and jaw pain. I was kept over night in the hospital but found nothing. Each day I tell myself tomorrow I will feel better, but I never do. It s hard to get up and stay up, I am always tired.