Why did I only eat 1200 calories

I posted on here about a month or 2 ago about eating only 1200 cals a day and if that was okay and every said no and ignored that stupidly and to make that matter worse most of my diet was junk food wether 600 cals was on sweets and another 600 cals on chickens nuggets so I have learned to regret that decision,
I would only ever sleep for 4 hours or 12-16 hours
I have this awful pain in my right lower abdomen I think my gallbladder possibly ,
my bladder is very weak dangerous low on iron

I only crave sweets which concerning
I’m obviously drowsy and on and on excrete blood and was constantly in a binging cycle , as
I recently went on a trip and that went really bad it set me of on a excruciating binge I at every hour and second for days straight and would be on the floor in agony from eating so much

I’m aware my eating habits are bad and I would try and fix it but then people say I look a lot thinner or different so I feel the need to push down into bad habits and it’s also social media and people around me that I see such horrible things people say about fat people and ppl are seeing that I’m getting slimmer and are nice/proud of me lots of underlying issues such as even the smallest things like my sister saying I got look no different yet everyone around me is saying the opposite such small things push me further mentally.