Not comparing yourself to lighweights...
If you've lost 68 pounds, I'd wager you're down far more than 1 size. One thing I recognized in myself as I progressed that I would wear very large/loose clothing far longer than it really "fit". When we're super plus size, we tend to hide under our clothes - and getting past that habit can be really hard!
I hear you on the folks that start out at "barely" over 200 pounds, and while they certainly have their own challenges, their experiences won't be the same as ours are/have been.
But, to give you a bit of a "it can be done" - here's me at the start of my 3 week pre-op diet (down about 20lb at that point), and me now - 162 lb (about 25 more to go)
I know how you feel! I was 362 on surgery day, and my sister was 268 on hers; which was 5 days before mine. I still have another 9 lbs to lose before I am at her highest before losing pre surgery weight of 281. She is already in the 100's, and I hate the fact that I still have so much more to go. We very neck and neck percentage wise, but it is frustrating. I'm so exited for her and myself too, but I just want to lose it all now. I try to focus on how far I have come, and to think of how little things would have changed without the surgery. I'm down 100 lbs in 5 months, and that is a big deal. Go us!!!