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I got migraines the other day when I was playing my game, so I stepped away from it. I have some sensory problems, and the cart button did some weird things (when I started the game for the first time after the patch, it did nothing, but one day later it did), so my headache might be caused by that thing.
But I won't be strictly negating that also other circumstances might have caused me feeling bad, I just can't recall another reason.