Cluster feeding exhaustion

My newborn is cluster feeding at the moment. He’s 25 days . during the day he wants feeding roughly every hour. he feeds and then falls asleep in my arms and then I transfer him to his crib. It feels like he’s restless in his crib and he wakes up within an hour wanting more. The nights are far more difficult. last night he literally wanted to be on the breast 11pm until 6 am. when he did fall asleep last night I’d put him to bed and he’d wake up in the space of five minutes and want milk again. Eventually at 6 am, my partner managed to make him sleep by gently rocking him. if I was to do that baby would just be rooting. How long does this phase go on for? It feels like I just came out of a cluster phase last week and my newborn had started getting into routine of waking every three hours during the day and every 4 to 5 hours during the night