Have you been checked for Eustachian tube dysfunction? A lot of this sounds similar to what I've experienced with it, especially the ear fullness and pressure issues. It can cause tinnitus/make it worse. If you are diagnosed with it, sometimes it can be corrected with a simple surgery in which they balloon the eustachian tubes. Personally, I ended up getting tubes placed for mine as that didn't work for me, but my ears are exceptionally weird and wonky.
Doctors diagnose almost everyone in a western country with acid reflux. It's a dietary problem and is unrelated to your tinnitus. As for that, don't see the ENT who performed the procedure that you think caused it. See a a different specialist who wasn't possibly involved in causing the problem.