annnnd another thing! I forgot about this one too - hold your nose closed with your hand, close both nostrils and swallow hard several times. You could
have some fluid behind your ear drums deep in your sinus which could be causing issue too. I would have also suggest holding your nose and blowing down it like you were to blow into a tissue - this would push your ear drums out the opposite way to swallowing but I should NOT suggest that as it can be dodgy.
hope you feel better