Do you ever just wake up hurting?

Might have something to do with depriving your body of essential nutrients: i.e. building blocks to repair muscle and tissue. Can't repair a damaged building without materials. Or, you just rolled over it in your sleep or something.

With arthritis yes, and sometimes have a pinched nerve in my back.

I wake up hurting all over due to fibromyalgia.

Perhaps you slept on it without knowing.. twisted it somehow.

Yup, my left elbow.