Why Me

I know we all have our ups and downs even with everyday life smacking us square in the face. I normally don't ask "Why Me"? but Why Me? I've tried all my life to keep myself healthy aside from the ocassional binge eating, and i've tried always help others in need. I don't understand why I am being hit with this afliction that is slowing my activities down and almost tying my hands on being able to do my job or the things I so love to do like training my dog. I know its not right to ask "Why Me God"? but Why Me? What did I do for you to single me out, What is the lesson I am suppose to learn through all of this? I read Psalms 139 again today trying to gain strength to get through this as I know the Lord is with me. I still don't understand and maybe I'm not suppose to but I still ask "Why Me Lord"? Help me have the strangth to make it through this and to understand what it is you want from me.