6 week old not sleeping during the day

My baby just turned 6 weeks today. For the past week he has been having trouble falling and staying asleep. He seems tired but seems to be fighting his sleep. When he does fall asleep he'll fall asleep for 20 minutes and then wake up and stay awake for 2-3 hours or longer. We have tried everything to make him fall asleep and keep him sleeping but all he wants to do is look around the room. Idk what else to do. Do any of you have any tips?