6yo w/ recurrent ear pain & blockage

hello,
my son has had recurrent ear pain and bluid up of fluid and wax inthe R ear since March, off and on symptoms. I have given homeopathic remedies w/ good results, but still recurrent at this time. I have taken the child to chiro for adjustments the past month w/ food restrictions, once a week w/ good improvement but a recurrent ear pain and some swelling outside the ear today after playing outside all day yesterday. Some details:
-has wax buidup tendancy, and current I cannot see the eardrum w/ scope due to wax.
-pale skin/face with some discoloring under eyes.
-tends to chew nails as of late.
-also, very importantly w/ ear pain/blokage is sinus congestion - he clears his throat often and sometimes can spit out some thick mucus.

I feel the sinus stagnant congestion is causing the ear pain blockage at this point - just my gut feeling.

Any help choosing a remedy would be greatly appreciated!

thank you in advance!
Elaine