Baby showing symptoms of reflux

I really feel you on this, the arching back and gassiness after feeds can be so stressful to watch and you must be so worried about your little one. It might be good to bring baby to see the PD before switching formula, just to be safe, because the PD can check if it is reflux or something else and advise whether a change in milk is actually needed. Some babies do better with anti-reflux formula but it really depends on what the PD finds, so better to get a proper assessment first rather than trial and error on your own. Hang in there, you are doing a great job looking out for your baby.