If this is your first outbreak and you're only 2 1/2 months into it, you can hope that like many of us the first is the longest and most severe. Mine lasted 1 full year and covered my entire upper and lower torso, front to back from my neck down to pubic hair. Then 6 months on and 6 months off was my cycle for about 4 years . The recurring outbreaks didn't cover my chest and were somewhat less severe. My sides and breast were never affected which does make the tie in to sun damage seen legit. I hope your sides are clear. I trained myself to only sleep on a side and never move, as any friction or pressure added to the misery.
I also used Flanax, a topical capsacian (hot chilies). It would initially burn, but within a few seconds the nerves must have been confused and the itch and pain would subside for about 20 minutes which could give me enough time to fall asleep. Surprisingly the initial burn was not an issue because any escape from the itching was a relief. Do not apply with bare hands in case you rub your eyes after wards. The trouble is if you are broken out over a large area it's simply too much to cover from this small bottle.
Yes like the rest of us you will learn more (not much is known though) about GD then any dermatologist.