When will my daughter sleep through the night ?!??!

She’s about to be 5 months and still drinks milk every 2-3 hours like wtf still a newborn i feel like i have at night she wakes up 3x 😤😫 my son slept through the night at 2-3 months but why is she taking longer?!?? Im tireedddddd .. it says no she shouldn’t be doing that .. less milk less hours now… i need help