how often to feed newborn

I counted from the start of the last feed (if she switches side I will take the start time of the side that she last fed on before being put down), but so far my baby has been waking up before the time is up. Hang in there and don't be too stressed! Anyway there is some room to play with if you're using 3h, my dr told me the max I should wait is 4h 😄