Dizziness pre-op

Hello all! i have gotten position vertigo and trying to get over it. I think its air pressure from my bi-pap machine that affected my inner ears. And i think that brought on the dizziness because i woke up with it. I went to E.R for it yesterday and they think its dehydration from not drinking enough Water. I have been on a liquid diet for over a week and a half now to get ready for bariatric stomach sleeve surgery. Please keep me in your prayers that it will go away so i can have the surgery ,otherwise they will have to move the surgery date
(Nov-20th) up to a later date,and i just want to get this over with .......Thanks Bajagal101