Has it been a while since you were in a 10? It's been the better part of 10 years since I was in a 10 (and I'm in them NOW compared to you in a 10 at my start weight/same height, when I was wearing 18s! ), and I have found that they are bigger than they used to be

Not that that bothers me, I just enjoy wearing my 10s

. I too never figured on going below a size 8, but with the size changes, I think I may end up in a 6.