PLEASE HELP NEW MOM baby went 6 hours without food is that bad?

I set an alarm to make a bottle every 3 hours. Anyways I get up to make the bottle and while I was waiting on the water to be done I got back in bed to rest and PASSED OUT. Baby didn’t wake me up at all and wasn’t even crying when I woke up second time. Baby is a two month old baby but was born premie at 34 week.