I do a lot of "floundering", sitting in my sewing room staring at the wall, trying to decide what to do. I think that is pretty normal. Sometimes I just reorganize my sewing room and refold fabric that's a mess.
Like you, I work and I usually have a take a short nap when I get home to recharge my batteries.
When I do find a project I want to start I go whole hog on it and that's all I want to do and usually end up doing more than one.
So don't worry about it, you'll sew when you want to.