This : This is likely due to eustachian tube problems caused by the sinus infection. The antibiotics will clear the infection and help with the inflammation. The nasal spray is possible a steroid spray to decrease inflammation, or a decongestant to decrease edema. The positional component to the symptoms could be due to mucous in the middle ear. Sometimes ear symptoms take a while to clear even after the sinus issues are over.
Answered 2/5/2019
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