7006, syringing your ears is unlikeky to help, as it sounds as if your problems are due to expansion of air in the inner ear.
This expansion of air is usually vented by a small tube leading to the back of the throat, but for some reason, this is clogged in your case.
Holding your nose, and blowing may help, also chewing and yawning works for some people.
In my opinion, decongestents may make things worse, due to their rebound effect, but others may disagree.