Yes you should consult an ent specialist
and get your ears checked and secondly get the x ray
When there is sinus infection
then the infected discharge drains at the back, and it causes swelling and edema around the tube behind the nose.
This tube gets connected to the middle part of ear.When the swelling is there then the ear gets fluid collection and get clogged .
YOu may require antibiotics , decongestants oral and nasal. and depending on the sinus disease surgical or medical management .
In doubt do reply