Weight gain and nasty sister in law TW

So my meds have helped me gain a dress size in weight in the last 6 months which I hate, plus I am bloated all the time for some reason which my GP will be hearing about but I try not to worry too much....and that is HARD. I am super insecure and self-hating and at my youngest sister in law's birthday recently, a somewhat estranged older sister in law decided to ask me if I was pregnant. Turned out she'd already asked my middle sister in law if I was pregnant, and she had told her no, so she only asked me to be spiteful (there's a bit of a history in the last year since my wedding just under a year ago and we don't really speak...essentially she has always hated me apparently). When I said I'm not pregnant, she said "Oh well then your stomach has got a lot bigger since I last saw you." I stuttered and mumbled and beamed nervously at her, trying my best not to start a fight as I am inclined to do exactly that, and then she still got angry with me for seeming unimpressed with what she'd said. Argh. My husband found out and was furious but we were leaving and I didn't want him to cause a scene. His whole family have been apologising for her and telling me I'm beautiful and have a great figure but I don't really believe them as much as I thrive on compliments. So I ended up getting very depressive and self-harming on my stomach specifically. Now I'm obsessively reading up dieting information and having a hard time eating. I keep getting very low still because of it then swinging back up and then right back down and so on. I'd been doing so well recently with keeping my mood balanced and I'm just so upset at her and at myself and I don't really know where to go with all of this. I hate that one little thing can ruin all the hard work I put in to self-maintenance with my mood and I'm just so fragile and pathetic about it. It feels like it'll never get better to the point where I can handle negativity and move past it without obsessing and punishing myself just as my parents had me do as a child and how I tried so hard to win their affection. I've tried with my sister in law too but it hasn't worked and I thought I had accepted there was no point and that she didn't matter to me. I just keep imagining seeing her again and saying all the things I want to say to her to hurt her and make myself feel stronger but I know that isn't the answer and I won't get to see her for probably another 5 months if at all so I need to get over wanting to have a showdown with her! Argh. Advice please!

Lithium will do that, I'm on it too. You'll need to adjust your diet and hit the gym to keep your metabolism up. As far as your sis-in-law, she just sounds like an ass. People like that aren't worth worrying about...unless you want revenge.

question
is it more women or men that do fatshaming