Long Sleep 3 Months Old

Hi my LO is turning 3 months tomorrow, she started sleeping through the night 3 nights ago, okay lang ba yun? Around 6-8 hours straight. Need ko bang gisingin to feed? Sa maghapon kasi 3 hours interval ang feeding niya then pagdating ng bedtime, once nakasettle na, deretso na tulog — usually from 11pm feed then tulog 12md to 7am. Btw, formula milk siya. Okay lang ba yun or need talagang gisingin para magmilk?