Mama, honestly 1-2 times a day ng watery stool ay normal talaga for breastfed babies at 3 months, kung paano ang consistency ng breast milk, yan ang output nila! Since ang pedia said hindi diarrhea and baby's okay otherwise (gaining weight, alert, happy), I'd lean towards continuing breastfeeding lang muna rather than forcing the formula, the transition stress might actually make things harder. If you're worried it could be lactose intolerance, you might also ask your pedia kung kailangan mo mag-adjust ng diet mo (like reducing dairy) before jumping to formula, since breast milk is still best for baby; pero if symptoms get worse (high fever, blood sa stool, baby seems uncomfortable) definitely check with your doctor again right away to rule out other things. How's baby doing otherwise, healthy, good weight gain, okay na skin?