Welcome to NeuroTalk:

I'd suggest you use a form of thiamine B1 and see if it helps.
Disulfiram blocks aldehyde metabolism, and thiamine enables it.

Some people may genetically be sensitive in this pathway and have trouble with it. A new better B1 is called Benfotiamine and lasts longer in the body. It is now available at affordable prices and costs just a little more than thiamine which is very inexpensive. Most of us here on this forum use Doctor's Best brand, and it is on Amazon now conveniently. I'd start with 2 of these a day, and if you improve, then drop down to 150mg a day after a couple of months.

If you have drooping eyelids, combined with the other weak muscles of the face, you should get tested for myasthenia gravis.
This is our forum:
http://neurotalk.psychcentral.com/forum77.html
Breathing issues come with MG, and it is possible your toxic experience damaged the neuromuscular junction.
(If you have had botox anywhere? --this could be a complication of that)

So do another duplicate post at MG forum here and see what those experienced posters think. Sometimes it can be difficult finding a doctor who understands MG.