Oh goodness! Well, I certainly hope you get to feeling better. I can sort of relate, but for different reasons.
Yes, having kids in school is like, "What do I do now?" so much free time and you don't know what to do with it lol.
My kid is starting 2nd grade and I am like, "Nope, go back to being 5."
But I am also starting my freshman year in college so that will keep me busy while he is in school.
You wont believe how much you miss the noise when the kid isn't there to make any.