It sounds like you have Eustachian tube
dysfunction due to your allergies, and have at least negative pressure on your eardrum. Things that can help this include oral decongestants, nasal steroid and antihistamine sprays, the valsalva maneuver ("popping your ears"), EarPopper.
Treating your allergies with oral antihistamines and nasal steroids as you are doing usually helps. It may take time, however.
Hope this helps. Good luck!