Cluster feeding at 6 days old?

For the last two days, my newborn son has wanted to nurse non-stop from the end of the morning hours until the middle of the evening. It’s crazy! I even tried having SO bottle feed him some pumped milk hoping to get a little break - but he is relentless. His weight is fine, he’s not fussy at all, poops normal. Etc etc. He’s just hungry alllllll the time. I didn’t experience this with my daughter until she was around 8-9 weeks old I feel like. Thoughts?