I binged on 1000 calories of oatmeal... is that bad?

I just binged on exactly 1000 calories worth of oatmeal ontop of everthing else i eat today (all healthy) so in total i eat about 2800 calories i feel so horrible! I feel all my effort at the gym was pointless and there is no point in going to the gym tomorrow... am i going to gain weight from this?
I binged on 1000 calories of oatmeal... is that bad?
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