The baby is 6 weeks old and falls asleep on my hands when I put him in…

The baby is 6 weeks old and falls asleep on my hands when I put him in his crib, he starts waving his arms immediately, touching his face, head and worrying, then cries and eventually wakes up, then falls asleep again on my hands, and it's a circle. If he sleeps for at least 20 minutes, then he starts waving his hands again, and that's been going on for a week now. He used to be fine before, but now something is wrong with his hands, like allergies, there's nothing like itching or redness, his belly seems to be less bothered too, what could this be??? I try to swaddle his hands at night, he pulls them out and even in