In need of some sleep


My 16 week old son was consistently only waking once around 4-5 AM to eat and then going back to sleep for another 2-3 hours. The last couple of weeks he’s been up multiple times a night. It’s 11:30 PM and he’s already up eating. And he finished a 5oz bottle so he was obviously hungry. We haven’t changed anything, so I don’t understand what happened. It’s this the 4 month sleep regression? Will it get better? When?! 😭