AWynkoop - actually, I can't remember the last time I was professionally fitted for a bra. For starters, most places just don't carry my size (too small). I started getting bras at juniors' stores b/c they actually FIT! Then I found that some cheap triangle bras from Walmart fit me pretty well - the elastic just bugs me after a while. So it's worth a thought... But most of the time I'm wearing sports bras anyway, so that's really what I'm looking for, and those usually just come in S, M, L as far as I know. Most of the time they fit just fine for the first hour (or maybe even more until I wash them...no, I don't dry them). It boggles my mind. One size is too big, the other fits ok except after it shrinks it's too tight. My problem truly is with
anything that contains elastic. I don't like it too tight around my hips/mid-section either, but I can tolerate it longer. Headbands and high ponytails have always given me headaches after a short time, and I notice that I don't like socks with too much elastic anymore, either. I don't know what the solution is, other than to wear soft, loose-fitting clothing all the time. I'm just grateful I'm not living in the era of corsets!!!
And Sachis, I agree with what you're saying about bras. I had heard about that study, and the theory was that the elastic cuts into the lymph glands under the armpits, hindering healthy function. However, I thought that it was discovered that that study was just a myth...? I, too, am trying to listen more to my body...it just makes dressing like a "normal" person very challenging.

I think this may call for some extra-special creativity. I'll put on the thinking cap, and if I come up with something, I'll be sure to post.

Thanks, ladies, for all your help!