Hello! The baby is having trouble sleeping at night, spinning like a t…

Hello! The baby is having trouble sleeping at night, spinning like a top, waking up every hour and a half. He's constantly hanging on his chest, but if I feed him on my hands, he falls asleep, and as soon as I put him in bed, he starts spinning again and wakes up. It's been like this for a week now. I don't understand what happened ? We're both exhausted like flies ... and besides, he has started having problems with bowel movements. He hasn't pooped for two days now, I wouldn't say that he's worried about his tummy, during the day he behaves normally. He's cheerful, plays. He doesn't cry at all.