Hello,
Thank you for asking the query.
There are few points which point towards an inner ear problem. Those are the absence of symptoms when lying down, dizzines, and response to Epleys. But certain symptoms like the facial numbness and blurring of vision does not co related well with an ENT problem.
Its possible that there are co symptoms with an ENT problem, but its better to be sure. And you Doctor has done the right thing by suggesting an MRI. May be your require a detailed examination by a Neurologist.
I understand this could be quite worrying for you. But its always prudent to rule any neurological cause by MRI and Physical examination. I am sure that this is nothing very serious than an inner ear involvement. But as I said better be sure than keep worrying for a long duration.
So specific advice : Get the MRI done, Consult a Neurologist.
Hope this helps