Sleep 😩

My son (3 months) used to sleep ok at night. Usually would eat, sleep for 5 hours, eat, sleep for 3 hours, eat and sleep for another 2hours. Well we have been STRUGGLING for the last few weeks. He’s up every 2 hours. I feel like I’ve tried everything that everyone has suggested with no luck. I swaddle him, use a noise machine, make sure he has a good feed before bed, give him a bath, keep the room dark. Any other ideas or things I could be doing wrong? My other son was much more predictable with sleep patterns at this age so I’m at a loss.