I'll throw in my 2 cents. First off, don't worry about what you paid for them, they correct your sight, its worth it. I switched to progressive lens about 3 years ago, I had single vision before. All the problems they said I would have, walking down stairs, having to move my head etc. None of that bothered me, not even for a minute. For example, I realized if I look down while walking down stairs, its blurry, but its doesn't bother me.
Two things that do bother me, when working on my tractor or a car and I'm underneath it, I often can't tilt my head the right amount to see what I'm working on. I'm lucky, my vision isn't that bad at that distance so I can take them off and I'm good to go. The other thing is watching TV in bed or a recliner, you are looking through the bottom part of your glasses and it doesn't work.
I'd say the biggest problem is you went from not wearing glasses to multi vision glasses all at once. So not only are you adjusting to wearing glasses, but multi vision glasses also. I would encourage you to stick with them, I know several people that should be wearing glasses but they don't. They suffer as a result, but don't want to admit it. I got single vision glasses when I was 18. I just remeber walking outside and looking at the grass, I could see blades of grass instead of a sea of green, looking at trees and seeing the individual leaves again. At the time, I thought man, this is great, I should have done this a couple of years ago. Stick with it and I think in the long run you will be happy.