so many night wakings

my baby is on her 5th wakeup of the night and it's only 4am this has been going on since birth really i literally am exhausted shes breastfed she doesn't take a bottle so its me who has to wake up so manh times every night the minimum i ever woke was 3 times she has only ever slept 4 hour stretches twice in her life. she seems to wake up every 2 hours and she will scream at her loudest if i don't pick her up and feed her surely she cant be this hungry all through the night she doesn't drink out a bottle either so never know how much she's really having