Why does he no longer sleep through the night?!?!

You guys I am dying!! My little dude was sleeping through the night right from the get go. I actually posted about it when he was a few days old because I was like what?!?! If only I had known to just shut up and be grateful 😩

We made it through the 4 month regression with our sanity mostly intact but he’s now 5 months and is getting up 2-3 times every night to eat. Every night around 9:00 we have bath and story time and then he nurses to sleep. I make sure he’s burped and then I swaddle him. He used to sleep until 6 eat and back to sleep until 9, but now he’s been waking up at 1 and 3 and 5 and then gets up for the day at 9. During the day he goes 4 hour stretches without eating but at night I’m lucky to get 2 😩