Huge hugs op, I’m the same, saw happy, healthy me on a Fb memory just a few years ago and was shocked. Not a weight thing really, although that’s a factor too, I just didn’t have the problems I have now (db whose autism has reached another level, mum elderly, a few deaths and myself and dh are at a crossroads and might break up).
Have started watching things that used to give me comfort, listening to music I loved, crying more (away from dc of course!!), phoning friends more (this was the hardest habit to start), sitting with dog more, going for walks more, visiting local stables just to be in the vicinity of horses(used to love horses) and am going to start swimming classes. Need to get back to more water, less eating after 8 and cutting down on bread, cereals and fizzy drinks. Huge huge hugs and best of luck in meeting your former self xxxx
edited to add went out for a fun alone day- gallery, window shopping, trying on flattering clothes (can’t afford but they’re on a list!!) and it was a game changer! Also back to enjoying skincare!!