I understand that you must be worried. From the signs and symptoms only, it would seem something more than simply Bell
palsy. The good news is that you seems to have undergone a pretty comprehensive evaluation in the hospital and everything has been normal. Had it been a compression of the nerves from a
tumor, an aberrant blood vessel or other focal brain lesion it would've been spotted on the
MRI, so while I understand that your symptoms are very disturbing, more than usual in these cases, perhaps in the setting of a viral infection, I believe it will gradually improve.
Regarding the blood pressure, yes looking at those figures you should have medication. Of course you should monitor it, if it was normal before perhaps factors like
stress due to your complaints and
steroid treatment have played a role in increasing it and you may reduce the treatment in the future, but for now it seems necessary.