help needed please..... Baby is 6 weeks Saturday. And we've tried everything but he keeps spitting/…

help needed please.....

Baby is 6 weeks Saturday. And we've tried everything but he keeps spitting/ throwing up just about everytime he eats. All his tests came back good, has been on acid reflex medicine for 2 weeks. it's helped the screaming but not the spit up. We tried Gerber gentle and soothing. Even nutramigen the all baby isn't supposed to be really good on. And still no change. Should I try different formula? I'm at a loss here. I'm going to call his Dr at 1. But I need some thoughts please and thank you.