My Skin Is Getting Really Saggy, My Hair Is Falling

my skin is getting really saggy, my hair is falling out, my muscles are getting weaker, and my eyes water out of control in the mornings. What is going on with my body? all this started happening very sudden within the last year.. I feel like Im going on 80 not 56. I have always been very toned and in good health, but lately I feel like this is not my body.. What is going on?