Each state is different, but there is usually a required number of practice hours that have to be met in order to keep one's license in good standing. In Oregon it's something like 900 hours in a two-year period; your mileage may vary.
I'm sorry this is happening to you. You have my sympathies! It's hard
to practice nursing when one has physical and/or mental health challenges. Like you, I struggle with whether or not I should stay in (I have some mild short-term memory deficits and issues with concentration/focus). I do have a great sticky-note system, and if I didn't have a smartphone I probably couldn't find my tush with both hands and a traffic cop directing signals
. But between the two, I'm making a go of it, and it helps to have accommodations worked out with my boss so I can make the best use of my work time. Are you absolutely sure
you can't practice, even in a lower-stress area or one where you can work part-time? You would probably have no problem reactivating your license once you get better, but you would certainly have to take a refresher course (with its attendant expense) before you could do so.
Not sure if any of this is helpful, but I thought you should know that you are not alone in this predicament. I wish you the best in whatever you decide to do.