Night feeding

My kid is freaking me out. He is always up by at the latest 4 to eat and go back to bed. He's only 4 months. He can't be sleeping all the way through the night yet. I just feel like he shouldn't go that long without feeding he still needs to eat at least once during the night sleep in my opinion it makes me nervous having hi mm go that long. I hate to wake a baby but I know he will go back to sleep and this will ease my mind but what's a normal age for them to naturally night ween. I just don't want my milk supply to drop cause beI g able to still exclusively breast feeding is really important to me plus holy heck my boobs are hurting lol the kids been sleeping for like 9 hours!

UPDATE he finally woke up himself only half am hour late. We just went from every 2 hours because of a growth spurt to going 9 hours overnight it kind of freaked me out a little when I beat him awake. My body is used to being up at 4 for a little bit I can't even sleep through the whole night anymore

UPDATE he went and did it again he my body woke me up before he woke up wondering why it wasn't feeding the baby and the baby was sacked out an hour longer than usual I ended up just needing to wake him to eat so that I don't stress myself out to insanity and can go back to sleep.