I uh… Don’t really have a lot to help you with your direct situation, but I do know that nair is designed to (mildly) chemically burn you. That’s how it destroys the hair. Make sure you have it all off of you so it doesn’t continue to work (it sounds like you did but it bears repeating). From there it should just be time until it stops feeling uncomfortable.
In the interim, you could take something OTC to manage the pain, if appropriate. Motrin/ibuprofen/paracetamol, whatever you’ve got on hand to deal with aches and pains. That should help you deal while it’s actively hurting, and hopefully by the time the medicine wears off, it’ll be back to feeling normal.
Edit: I’m not sure what Destin is - double check to make sure it doesn’t interact with whatever pain medicine you take.
I bought my parents a laser printer after years of them being incredibly frustrated by inkjets. I got them the same model as me, as well as a spare toner cartridge.
I’m still on my original toner cartridge, and I’ve had it for probably six years or so.
My parents are in their late 40’s and early 50’s. I think I might have accidentally gotten them a lifetime supply of printing.