Looking at the big picture, I'd go for sleep over all else. You can't go without sleep for long until your whole world falls apart, mentally and physically. Really sorry to hear of the burns, that's terrible.
Since I work outdoors running equipment and doing physical labor, I hurt alot for my age. I take what I call a contractors cocktail, 3 ibuprofin and one excedrin (or generic) before bed. Alleviates pain until I can fall asleep. May try some combination of over the counter meds that won't trip you out.
