Tips colicky(?) baby

My baby has been non stop crying since like 5-6pm. He’s barely eating, keeps spitting up & getting mad at his bottle. He’s been gagging every now & then today too I’ve noticed. It’s now 10pm, I’m exhausted & he’s still awake extremely fussy… any tips? He’s 8 weeks old. His crying is making him sweaty, he’s in an undershirt swaddled at the moment. This is the first time he’s been like this… I’ve tried his bouncer & his swing. He’d stay asleep in his swing for 30 mins then up again, then back asleep for 30 mins. 🥺 help!