Hey, Cindi..
Wow, that's quite a story! Really hard to figure out what is going on here, sorry you have to go through this.
I don't do tuboplasties myself, still sort of experimental and not done routinely in kids (I'm a pediatric ENT doc).
You don't give any information about your profiles, but this really doesn't sound much like DCS. The devil is, of course, in the details. It sounds like your primary symptoms is a clogged sensation in your ears, right? It would be good to know the results of the ENT exam and audiogram when you were having those symptoms, to see if it correlated with objectively measurable Eustachian tube dysfunction. I can see how a chamber ride might improve symptoms of ET dysfunction just by changing ambient pressure and forcing equalization, but that wouldn't explain the relief of symptoms 3 days after the hyperbaric treatment. Also, the fact that your symptoms resolved with myringotomy (hole in the eardrum) pretty much nails the diagnosis as ET Dysfunction, and not DCS. Negative pressure is a fairly mild form of ETD.
It's also odd for a dive professional to suddenly have problems equalizing after many years of being able to do that. I guess you had a CT scan which is good to rule out any physical lesion pushing on the ETs. It's normal to feel nasal congestion after septal and sinus surgery, but that shouldn't really have any effect on the ear symptoms.