If i am not mistaken and you have to check this:
My nephew's pedetrican once told his mother that usually some children from age 0 to 5 have a certain condition ( actually i don't know the term in English) where it can happen that during their sleep their breath stops and starts making sounds like a roaster as a result of the absenseof air coing in or out and they can actually turn blue. When this happenes some drops of chortisone ( the brand name of the drug here is predesol ) are given to children so they can breath. Usually this condition is triggered when the child has cold or flu or he was annoyed and cried while asleep. Usually this condition disappears when the child becomes 5
The doctor explained what hapenes to the larynex ut actually i can't remember ,but he told my sister in law to keep this medicne at home in case this could happen any time during sleep
Mariam, i don't know if this is the same case or not, but you have to check with the doctor
manal