Help! Newborn cries himself awake!

My 5 week old will sleep for 30 minutes and then wake up crying loud as if he’s in pain or uncomfortable. I nurse him, swaddle him, change his diaper, and he’ll fall asleep content. Then another 30 minutes to 1 hour later he will wake up crying so loudly. He just had his doctor appointment last week and is doing fine, no health concerns. Nothing else comes to mind health-wise that could be wrong. Any advice?? I don’t know what else to do, this doesn’t happen all the time but I don’t want to miss anything and I want to make sure he’s okay!