Unfortunately the burn that occurred will take a long time to heal, and I'm sure there will be ups and downs as you heal. Voice rest is voice rest, and I'm sure just a little talking might be irritating. I don't think ibuprofen would be harmful to your throat as long as it didn't get stuck in it. I can't take any NSAIDS because my stomach is very reactive. Tylenol is my only option, and I try not to take that unless I absolutely have to.
I guess it's possible that speaking AT ALL could cause irritation.
I have mild hoarseness a lot of the time...I think I've had it so long it has become chronic, and I need to go on voice rest. I'm a retired teacher, and up until last June I was using my already hoarse voice a lot...even loudly, as I directed our class play with another teacher. Just teaching is killer if you have any voice issues, as you know. I took a hike today and the tree pollens are pretty high. By the time we got back into the car, my voice was hoarse again.
If I were you I would definitely go to the throat specialist (an ENT?). You've gone through a lot with this, and he/she can take a look at your vocal chords and see what's going on. It'll relieve you to have a specialist check them out so you know just what's happening with them. I went to a highly regarded specialist in our area. He ended up doing a scope and was able to thoroughly examine them and take pictures. It's uncomfortable, but not that bad. It's worth it to know what is happening.
Of course if you're cured by then, there will be no need, but if any hoarseness persists it would be good to have your chords evaluated.
I'm definitely not a doctor! I did go online to look for some resources regarding how to heal hoarseness. I'll share the links with you.
Ironically, I even found a link for an article entitled…”How to Lose Your Voice Using Lemon Juice”…Seriously.www.mademan.com/mm/how-lose-your-voice-using-lemon.html
Here's some general information about
Here are some with treatment ideas...one thing they all have in common--stay hydrated and drink a lot of water...www.howtohealstuff.com/how-to-heal-vocal-cords/www.ehow.com/how_5027492_heal-protect-voice.htmlwww.steadyhealth.com/about/about_hoarse_voice.html
And here's a PDF with general information regarding causes and treatmentssorethroatcare.com/Throat%20Care.pdf
I can't speak to the credibility of any of these sources, but I found the suggestions interesting and they seems sensible.
Good luck! Hope you get better very soon.