First, Glad to hear you are getting better bit by bit.
I am a dog owner as well and there are days when I just can't even think about doing happy dog owner stuff with my Paddy. So long as you are taking care of her base needs such as food,toilet, and health, she's not going to suffer from a day or two of low or no activity.
Get some dog toys that are designed to entertain dogs without much human interaction, like the one where you put the treat inside and the dog has to figure out how to get it out. Look at a pet store's website for more ideas on toys the dog can play with on her own.