Hi, I'm sorry to hear that you're having such a hard time right now. I don't have a huge amount of advice but I also have bipolar (II) and an eating disorder and am on a mood stabilizer that doesn't cause weight gain, there are a few out there but it can take awhile to find the right one. Please don't give up, I don't know the UK system but I hope that you are able to sort something out
xx
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