@grannydee, I can certainly relate to your pain at night from arthritis. I too like to doing daily exercises which helps the joints and keeps me going during the day but I have the habit of waking up a lot during the night even though I get a fairly good nights sleep. I also use a CPAP which helps my sleep quality but doesn't keep me from waking up due to joint pain and having to switch positions - the joys of being a side sleeper 🙃 What has helped my some is not exercising close to the time I turn in for the night and keeping a regular schedule for going to bed. Here are a couple of articles with some tips but you may have already seen them.

Why are arthritis symptoms worse at night?: https://www.medicalnewstoday.com/articles/arthritis-symptoms-worse-at-night
9 Ways You Can Sleep Better with Osteoarthritis: https://www.arthritis-health.com/blog/9-ways-you-can-sleep-better-osteoarthritis

I've heard some folks find it helpful to drink Chamomile tea before bedtime. Have you tried anything like that?