Hello and welcome to Neurotalk.
Epley manoeuvre can be used for Benign Paroxysmal Positional Vertigo - BPPV.
http://www.racgp.org.au/afp/2013/jan...ley-manoeuvre/
Benign Paroxysmal Positional Vertigo (BPPV)
I'll leave a PDF regarding vestibular disorders that might help in figuring out whether that is what you're experiencing or not.
There is also a difference between feeling dizzy and having vertigo.
Causes of Dizziness - pdf
Includes definitions of dizziness, vertigo and disequilibrium, and spatial disorientation.
https://vestibular.org/about_balance
The blue paragraph headers on the paragraphs on this page contain more info if you click them.
How Do I know I have a Balance Disorder- pdf
from Vestibular.org