Newborn feeding is all over the place!!

My little one is two weeks old and his eating patterns are constantly changing. I swear he is a new baby every day. Two days ago he was cluster feeding 20-25 minutes ever 1.5 hours. They yesterday he was eating 30-40 minutes every 2-3 hours. And then today he ate 20-30 minutes every 3-4 hours. But these past couple of feedings he as only eaten 10-15 minutes every 2 hours. I’m worried if he getting enough. He has a dirty diaper with almost every feeding still. Is this normal to be this sporadic with feeding?