Sick baby 😩

My 10 month old has been since since Friday, throwing up, diarrhea and won’t eat. I took her to the dr and they said it was just a stomach bug and gave me instructions. Tonight her whole busy got hard and she started screaming her head off like deep screaming and crying and started having diarrhea constantly because of the pressure from crying. Her belly is hard, the only thing she’s had today was applesauce and some formula, she won’t drink Gatorade, pedialyte or water. No fever.