My baby boy is 5 and a half months old. He is on breastfeed. He pees around 10-12 times during the day. However, he doesn't pee at all during the night (from 10pm to 6pm). Once he is awake he will pee properly. During the night he wakes up for feed but he is very sleepy so feeds less. I don't make him wear diaper during night. Is this normal or I need to consult doctor physically? Please suggest. I am so worried.