Any Suggestion For Unilateral Tinnitus?

for 2 months now, i have had unilateral tinnitus (right ear), no hearing loss or vertigo. doc did MRI, no vestibular schwannoma or cerebellopontine angle mass found. MRI mentioned mild mucosal thickening in ethmoidal air cells. recently, the ringing went from low pitch to sometimes high-pitch. in the morning there's less ringing but more pressure in the ear, it changes to more ringing and less pressure as the day progresses. 2 days ago, i felt some dizziness (similar to the buzzed feeling after some alcohol). went to urgent care with no major findings, was prescribed meclizine. any idea what's wrong with me? thanks!