Why am I so soar that i feel beaten up and bruised from my shiatsu massage pillow?

Why am I so soar that i feel beaten up and bruised from my shiatsu massage pillow?
umm i would not do that for too long i would say a week cuz i went to a chiropractor and my mack was bruised nd it took a week to get better :( get well sooon duudeee !!
I layed on it last night for an hour using it on every area of my back. It hurt while using but I thought it was rubbing out soar muscles. this morning I woke up and my back hurts so bad it feels like there's bruises everywhere but I don't see any. Am I okay? How long will my back hurt? should I be scared cuz I am?

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