Advice

My little boy is 6 weeks old and doesn’t seem to be hungry- I find I’m feeding him every 4-5 hours in the day out of fear he’s not consuming enough but he never cries out for a feed. He spends a lot of the day sleeping and more recently I’ve found when he’s awake he’s seeming uncomfortable. He is showing many signs of reflux, would this cause him uncomfortable when awake? I read online that they should be consuming at least 150mls per kg, is anyone else going off this or feeding baby less when less is wanted?