Doing something = Hurting

At what point in our lives do we sit down and tell ourselves "you are getting older." I think my mom is crazy, she will do anything and everything and she pays for it in the end. She has a terrible back and has had problems with her back and neck for as long as I can remember. I think I felt better this morning because I took pain pills last night and watched a movie with my kids. I didn't wash, clean, pick up, or do anything. This morning as I began to do my quick clean up around my house I noticed I started hurting again. Jack Jack wanted me to hold him and it hurt just to hold him. Then to top it all off the driveway was covered in snow again and Brian has done such a good job of keeping it clear that I thought I can't ruin that. SO I waited until 2:30 thinking maybe it will melt, no such luck. There was less than an 1" I would say but it wasn't going anywhere. So I gently pushed it down the driveway with the shovel, no major shoveling required. I felt crappy after, I wanted to go lay down and take med's.
When did it get to the point in my life that I can't even pick up the house without having pain or push a touch of snow down the driveway without wanting to go and lay down. Is that pregnancy or is that me showing my age?
I really hope it will come to an end soon...
Tonight we had our women's Basketball game, I wanted to play so bad and I feel like a total flake and faker for not feeling up to it. I hate not feeling good, because oft times I tell myself that it is all in my head and that if it were someone else they would be fine. Brian doesn't help when I tell him how crappy I feel and he yells to Aiden to "grab the Journal's by my (his)side of the bed. The one that says Pioneer on it."
I hate getting old!