I keep feeling ugly and fat lately and I don’t know why?

I’m 127-128 pounds and 5’8” so not objectively fat or anything but I feel fat and just plain unattractive lately. I just turned 26 so I don't know if that’s it. I get my hair and nails done, eat healthy, etc. I just can’t stand looking at myself and don’t want to go out places much for some reason.
I keep feeling ugly and fat lately and I don’t know why?
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