<human>: I'm not sure if this is the right place to post this, sorry if it's not. I comfort eat a lot. I'm in my early 20s and had a horrible childhood with no parents or siblings for comfort, but food was always there. It's comforted me my whole life and my weight has fluctuated like crazy. My heaviest ever weight is 70kg of pure fat on a 5ft 7 frame, and my lowest has been around 50 kg. I either turn to or reject food depending on the situation. Right now is a highly stressful time in my life, I failed this semester of college and only have 3 weeks until the retakes of ridiculously difficult courses. My stress levels through the roof. This is affecting my diet massively. I had a month of exams prior and gained a stone of pure fat from an awful diet, I'm sure it's more at this stage.
Due to overeating everything in sight and often overeating sugar I'm also getting huge sugar highs and lows. The lows give me really bad brain fog which in turn makes me turn to more sugar. So I guess the point of this post is that I'm going through a lonely and stressful time and food is the only thing that comforts me, but I don't want to end these 3 weeks on the brink of death and physically ruined, and I know my poor nutrition also affects my ability to fully concentrate on my studies too. I need advice from someone who has dealt with something similar and who has tips for surviving these 3 weeks not being a whale but also not losing my mind.

Can you give me a shortened version of the text?
<bot>: comfort eating is the only way I know how to cope but this time it's out of control and my health is really suffering. Need advice from someone on how to survive next 3 weeks.