Yes, the Epley maneuver is what they use to help restore the ear crystals back in place. The only issue, from what i've read, is that if you do not know what side is causing the issue and do perform the maneuver on the wrong side, it can make things worse, or cause the other side's crystals to get out of whack <----NOT my area, please correct if I am misrepresenting this, lol.
About a year ago, I kept getting lightheaded with some dizziness, but it never escalated to very severe. Actually, last year when we went on Spring Break with the kids, we hit up both Universal Studios and Disneyland, and I was nopt totally over it all yet, so some of the rides screwed me up where I felt super light-headed, out of breath, and almost wanting to vomit, haha. I kept it to myself since we were with the kids and kept getting on all the rides....not gonna bitch-out like that
Then, July 5th, I got it super bad, and I was layed-up for a good couple of days where I could not move at all hardly without the room spinning. The last few days were not as severe. I was so nauseous though, it sucked bad. I just layed in bed most of that week and hit up Netflix though, lol.
When it hits hard, you have to stay calm or it makes it worse. Shit spins hard like you are drunk off your ass. Best thing to do is concentrate and focus looking at 1-spot until the spins go away, and just breath and stay calm. It will stop spinning until you move around again. Going to take a piss is a challenge, especially at night
I got it again the week prior to this last Christmas, then again like 1-2 months ago, but they were not as bad, but not too bad. I tried working out during this last run, and i had to stop because I was afraid the dumbbells would drop ion my face (chest), and then I felt like vomiting.
My ears feel like they have fluid in them right now, and i'm waiting for it to hit me again.
There are different reasons why vertigo can occur, and like it was mentioned above, it's hard to diagnose, or find the reasoning for it. I'm almost certain mine is because of my eustachian tube not draining correctly after i get a head cold, but who knows.