My baby is 1 year 7 month old. His weight is 11.4 kg . He was having fever last week which last for 4-5 days. During the fever he was on milk only. He didn't take any solid food. He doesn't have fever anymore but from 2-3 days he becomes sleepy after every 4-6 hours. Although he remains active meanwhile. Is it okay if he sleeps after every 4-6 hours ?