Well I LOVED that engrossing summary of your travel “miss-” adventures! 
Luckily, I seem to always have hubs with me as my extra “ears” when I travel here or abroad. But in my dotage, (just turned 71 TODAY), I am no longer reticent or hesitant to tell ANYONE in my vicinity that I wear hearing aids - often whipping one out my ear to show them: a fuschia pink Phonak 312 or a Caribbean Pirate teal-colored one. LOVE my aids!! They are like jewelry to me.
Yes, it’s good to have tools to use just to have a backup to critical details. I use FlightAware to keep track of my flight’s time and gate number. But honestly, WHY OH WHY can’t airlines not only have the “Arrivals” and “Departures” boards all over, but EACH AND EVERY GATE put a frickin’ SIGN on a TV monitor: Flight 319 Reno NV to Los Angeles, CA departing 2:19pm.
WHY? It’s stupid to make communication of such critical info so difficult! On top of which, we have the usual 12th hour panics - f’instance, leaving Istanbul coming back to the US, we were strolling the terminal when we heard our gate change announced - over the ROAR of human traffic and ambient noise at this humongous airport. - to a completely different terminal, which entailed us RUNNING fast as we could to get there. We’ve had similar gate changes at SFO, where we ran PELL MELL from one terminal to another, only to find out we had 3 minutes to run right back to the terminal we’d fled, cuz the gate changed twice. WE MISSED THE FLIGHT. So we were sent outside the airport, and had to re-enter and go through security alllllll over again. There was no signage at these gates to let us know it’d been changed - TWICE in a short period of time.
Same kind of signage would help folks at the doctor’s office. My orthodontist of decades ago had a simple TV monitor in the office that listed patient’s LAST NAME, and number in cue, so you could track your progress to the doctor. Same at the Social Security office where I live now. VERY good signage, and so appreciated by me, even with my mostly-functional Phonaks. These businesses are in business to serve people, and that requires good communication, right? If we just blow off an airline, we’re charged for the ticket. Ditto at doctor’s office. But if they don’t communicate clearly with us, we pay for that, too.
It turns us into apologetic passengers and patients when we ask for something that should be the given right of EVERYONE, no matter their health or disibility. I applaud you for sharing your personal experiences and thoughtful analysis of the situation. You take responsibility and THEN SOME for these events. I’d just say, use the tools you can to stay on track, go ahead and share that hearing challenge with EVERYONE - they have their own life’s challenges to deal with, and really could care less about what we may be trying to hide.
I feel liberated sharing my colorful aids and hearing challenges with folks - telling hotels or lifeguards or places when the aids are OUT and I’m on my own that you could set off an M-80 and I’d sleep or swim right through it. That usually cracks them up, but I’m dead serious!
Thanks for sharing your journey!