Ok so my 2 month old has been sleep since 11:30 this morning and it's now 5:15. She usually wakes up…

Ok so my 2 month old has been sleep since 11:30 this morning and it's now 5:15. She usually wakes up every three hours to eat. I friend waking her to eat but she barely would eat she kept trying to go back to sleep. Should I be worried?