Gassy baby @ night

My baby is 3 weeks old tomorrow, and at night he’s really gassy. He grunts & lifts his legs. I’m assuming it’s bcuz he’s gassy? It wakes him up once in awhile making him upset & uncomfortable.

What can I do for him? Would gripe water at night be beneficial? I feed & burp him at night, but sometimes he will just give a cheap burp. I read that I need to make sure his head is higher than his belly when I feed him. (He’s bottle fed). I don’t want his belly keeping him (and me lol) up at nights