Ay, mama, I can really feel your worry dito, blood in stool is scary talaga, lalo na first time. Good call na dadalhin mo ulit sa pedia bukas, kasi kahit okay ang fecalysis, kailangan tignan niya properly kung bakit bumalik. A few of us mum friends din nag-experience ng ganito, at minsan it takes a couple of visits to pinpoint kung ano talaga ang cause, so don't lose hope. For now, just keep monitoring, note kung gaano kadami, anong kulay, at ano ang kinain niya bago maging ganoon, para mas maingat ang pedia. Sending you strength, mommy, you're doing great by being this attentive!