Baby swallowing air with bottle

Ka

Baby is 4 weeks on Sunday. We have the smallest nipple, have tried several different bottles. He just gulps and chokes and swallows so much air. We have tried taking the bottle out every couple sucks to control how much he takes and he just gets so mad. We have tried gas drops, probiotics extra burping, warm baths...He has soooo much gas. He’s constantly farting and grunting. Idk what to do 😅