Please tell me, we have three weeks, my son cries when he's near me, e…

Please tell me, we have three weeks, my son cries when he's near me, even on my arms, I always go around, only when he's held on my chest does he calm down, when others hold him, he's so calm and immediately falls asleep with them, when I hold him, he doesn't sleep at all, I rock him and that's it, he starts screaming right away, I give him to someone, he stops talking, I don't understand what the problem is, it's so hard (((