Aw mama, I can totally feel your worry, two weeks in and all the gas at tummy troubles are scary! Since your baby was pooping regularly pa up to August 16, and ang pedia didn't flag anything during the check-up, it's likely just the normal digestive adjustment na nangyayari sa babies, especially around this age, but honestly, given na 2 weeks pa lang siya at ganito kalaki ang tummy with all the gas, mas safe na i-message or call your pedia ulit just to be sure, kasi basta may changes like constipation or bloating, better safe than sorry. A few of us tried switching formulas before, and yung pedia usually gumagabay kung kailangan talaga ng change, don't switch on your own muna kasi sometimes the tummy just needs time to adjust sa formula. You're already doing all the right things with the burping and massage, so just hang in there and let your doctor guide you on whether S26 is still the right one for her. Sending you hugs, mama, 2 weeks is still so early, and you're doing great!