My baby is 6 weeks almost 7

We stopped breastfeeding at 3 weeks. She’s recently super gassy and cries during feedings she after sometimes burps twice during a 2 oz bottle then again if she drinks to4 oz we are on similac pro advance . She has wet burpsat times and I hear things try to come up and hiccups a lot . She’s just fussy a lot and likes to

Lay on her stomach on my chest 24/7. Should I switch to

Pro sensitive similar . Formula mamas what helps with this or try gripe water in her bottles???