Clingy baby

KP
So my son has been super clingy lately! When I drop him off at daycare he gets fussy and his teachers say he fusses until I come in during the day to nurse. At home he's fussy with his dad until I come grab him. He will only fall asleep on me. If I put him down and walk away he will scream. What is going on? How do I help him enjoy other people again?