Ay sis, natanggap ko yan! Kaya mo yan, breathe lang haha, a few of us in my mom group have done keratin treatments while breastfeeding and okay naman kami, but honestly the safest move is quick check with your OB or pedia lang to be sure, especially since cysteine formulas vary and you want peace of mind, di ba? Kahit anong ginawa mo na it's done na, just make sure the space was well-ventilated (it should've been!) and you'll be fine going forward. Next time maybe mention to your stylist na breastfeeding ka para ma-recommend nila what's gentler, pero for now don't stress too much, maraming moms natin have been through this.