Art Book!

help

I don't know what's happening to me but every few minutes or so I get a chill not the coldness just the feeling of it and it goes away quickly and it's very waving. My head is heavy and I can't sit or stand without feeling uneasy. Can someone help...Or does someone know what this is?! I've had it multiple times. Most of the time after a shower or nap. Please...does anyone know what this is?!?!