It used to stress me out so much, if Oscar had slept for more than 4 hours and wouldn't feed I was like 'OMGoooood panic stations' lol, but I should've just let him sleep because in the end all I did was create a sleep problem for an actual good sleeper!
Obviously if baby continues losing weight it's a problem and waking for feeds is maybe a solution, but otherwise I would let baby sleep and me sleep too lol I used to set my alarm for every 2 hours for like over a month I think, I was shattered, like a zombie coz i was only getting 2 hours sleep then spending about an hour or so trying to wake him to feed then trying to get him back to sleep. OMG makes me feel tired just thinking about it!! xxxxxx