I am so happy for you and I can completely relate! It is hard to catch up with the rapid changes occuring. Of course we might think the weight loss doesn't occur fast enough but it happens faster than we think.
I don't know about the bottoms, (I still can't give up my old ones yet and I'm wearing them extremely baggy), but I went shopping yesterday and I am a 3x in a non stretchy material!!! I don't even remember the last time I wore that! Of course, like you I still go back to the 5x and 4x and it isn't until I try them on that I'm like, "Uh, duh they don't fit anymore; that's why you're here in the first place!"
Oh, I can't wait to shop in normal stores and purchase a size 12, 14 or even 16 or 18. Keep up the good work chic; you're obviously doing something that is working!