fussy baby 6week old

all along baby has been fine, since last night, she’ll wake up every 1-3hrs(usually 3-5hrs) & scream bloody murder till she gets milk but can’t finish usual amount (fully on ebm) & rejects pacifier since last night. she also seem to have trouble sleeping for more than 1.5hr straight. any idea what’s wrong? she don’t seem gassy & no fever.