My soon-to-be 4 week old (tomorrow) has been comfort nursing in the evenings lately. For the last 2 days, anytime after 6pm he'll act fussy/hungry but when he's latched he'll actively suck for just a few minutes. After that he's asleep and doing those flutter sucks. Usually I don't mind, but I'm worried he's not eating enough in those feedings. Does anyone have a similar situation? Do you let him suck as long as he wants? Sometimes he'll pull my nipple hard, and it gets painful!