Team No Sleep

Anyone else’s baby just not sleeping at night? My baby will be 4 months on the 25th and I’m at a loss. He used to wake up to BF every 2-3 hours and go back to sleep. Now it’s hit or miss and I’m lucky to get a 2-3 hour stretch. We’ve been going on 2 weeks of this. I’ve been watching his wake windows, I’ve tried earlier bedtime and later. He takes 3-4 naps a day. I feel like he’s too young for it to be the 4 month sleep regression but maybe not?