This, exactly. Used to wear a much larger size, now fitting into something dramatically smaller, sometimes even smaller sizes are too roomy. Genuinely too big. Yet somehow still reaching for the largest size first, even though the old self never wore anything that small to begin with, always sized up higher than that. Happens constantly, and now none of the old clothes fit right, everything looks off, like drowning in fabric that used to fit perfectly. Still can't stop reaching for those oversized pieces though. Tried sleeping in an old oversized cotton shirt recently and woke up practically tangled and choking in the extra fabric, arms twisted out of the sleeves entirely. No idea why the instinct to grab the big stuff persists. Even bought a formal gown for a family wedding and had no idea what size to order anymore. Still hard committing to buying smaller clothes. Ended up sending that dress back more than once, ordered progressively smaller sizes each time only to find they were still too loose, got frustrated with the wedding date approaching and ran out to a store instead for something that actually fit.