My baby 3 month 15 days old. He has a sleeping problem. He sleeps very less. And that to wakes up in between his sleep. He starts crying whenever I try to put him to sleep. What to do?

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Hi Arpita 3.5 months old can't have sleeping problems, pls don't name it. All the babies are like that, they tend to wake up when we put them down. How many hours does he skeep in day? How many hours in the night? Are you breastfeeding him? My 21 month old daughter still wakes up frequently in the night.