I was diagnosed with unilateral sshl in august 2020. after having completed a mri-no tumor was found and i also regained a bit of my hearing. i am still trying to figure out what could have caused this- could sleeping on my ear contributed to this?

The etiology of sudden sensory hearing loss (SSHL) is still controversial, a majority of cases are idiopathic, i.e. unknown cause, and some may be related to viral infection, microvascular events due to a hypercoagulable state, and autoimmune disorders. No, your sleeping position does not cause this syndrome.

People who develop SSHL often awakened with it. I don't think sleeping position plays a role. I think the cause is elusive. Possibilities include a circulation issue or an autoimmune reaction. Obtaining prompt appropriate treatment is of utmost importance.