Another vote for Cholodin, I used to buy it for Sean through KV Vet Supply: https://www.kvsupply.com/Search.aspx?query=Cholodin
I can relate to what Gracie and you are going through. I had the same experience(s) with Sean and also left night lights on throughout the house. Since we live in a two story house and Sean started having difficulty climbing stairs I would sleep in the family room on the first floor. He would pace constantly at night and go to the back door to be let out but nine times out of ten never did anything, i.e. he would circle the yard, come back in and then act like he had to go out again. The Cholodin was helpful, not a cure but definitely helped.
Thinking of you and sending special thoughts to both of you.