Son is hospital

On Thursday 4-18-19 my 4yr old had his tonsils removed and last night around 5:15pm he started puking blood we rushed him to the ER and after an hour they sent us home and now at 7:00am he woke up crying in pain and throwing up blood again so I had to call the on call ENT doctor and they had us take the hour drive to the bigger hospital and they are keeping him over night, this is his first hospital stay, so far he’s doing good they gave him an IV for fluids with son potassium his his was really low for him and now he’s playing in the hospital iPad playing games. Our goal is to be discharged tomorrow as long as he don’t throw up blood again.