Just dream feed, don't need to wake her up, If she doesn't wanna drink then don't force? As long as she is gaining well no issue. My lo sttn since 1 week old, 7-8hr kind, shut mouth tightly or scream murder till we put her back down. After that we only dream feed her n it's not always that she will drink, by 3months she slept 13-14hrs at night, occasional dream feed