Fussy baby won’t sleep

My son is almost 5 weeks old, the last couple days he’s been acting like maybe his stomach hurts, he’s very gassy and gas drops have done nothing. All day today he’s been extremely fussy, couldn’t get comfortable and barely slept. Now it’s 11pm and he’s wide awake fussing away and every now and then he’ll tense up and cry like he’s in pain. I’ve tried rocking him, swaddling him, he won’t take his pacifier for more than a few seconds at a time, I’ve tried his swing, leg exercises for his stomach, I’ve tried just holding him and cuddling him, he’s fed, he’s changed, I’m really at a loss and I don’t know what to do. Am I missing something? Does anyone have any advice?? Also he’s formula fed, I’m not sure if it’s maybe the formula that’s upsetting his stomach.