Feeding

My son is 7 weeks old. He’s on Zantac for acid reflux which has helped him a ton. We started warming his bottles (was using room temp water) to see if his fussiness and spit up would calm down. Well it did for 2 days. And last night into today every time he eats his stomach is gassy, he pulls from his bottle and cries. It’s like he wants to eat, but can’t. Idk how to help him. I gave him gripe water and bicycled his legs. He’s pooped twice already this morning. Any ideas? He’s on formula