I have a similar problem, since coming back to the home country. ENT specialist has checked ear drum and also cleared with pressure sensing instruments.
Been on medication for one week, still no change to the situation. I can feel the change in air pressure but is not an extreme discomfort.
One curiosity I have is if a chiropractor be any good for this situation? That is it possible it is not involved with the tube?
Thanks for any advice.
SW