Help me

Baker 👽

All of a sudden my four month old who was sleeping through the night is getting up every two hours again. He just won't stay asleep. Also. EVERY SINGLE TIME I put a new diaper on he poops and it's weird cause he was only going once a day. It's loose and the color is mostly normal but I don't know what's going on. I gave it a few days and day five it's still going on. What is going on with my baby? Help 😭