Sleep help

My baby is 3 months. I’m trying to put him in the crib since he’s kinda outgrowing the bassinet. So he’s not a great sleeper. He dosnt sleep well unless being held. He sleeps for 30 min max at a time during the day and he starts to squirm and wakes himself up. At night he sleeps in longer stretches but wakes himself up twisting and turning. He dosnt need food. He can go 10h without eating at night but he still wakes up several times but always at 3am he’ll wake up screaming. I’m not sure what to do to help him figure this out. Any advice? I know a sleep regression happens around 4 month but he just turned 3 months. Can this be it? Idk if anyone has advice please help!