Diarrhoea baby

Hi everyone. My 6 week old baby is having watery to loose yellowish stool since Monday (3 days ago). Mon n tues was 1 episode each day. Today wed already 3 episodes. He is currently fully breastfeeding, direct latch 6 to 8 times per day, 2 times bottling ebm 90mls each feed. Diaper 5 to 6 wet pee diapers, usually 3 poo diapers (soft yellowish stools). But none of soft stools since Mon. My elder daughter is still drinking ebm 2 times a day (250mls each feed), had 1 episode of watery stool in childcare yesterday, Tues. Today she havent poo. Both dont have other symptoms of stomach flu. So do i need to bring my baby to consult PD? Or i need to change to non spicy food diet? As after 1 month confinement, i started to take very mild chilli. Or any other dietary change? Tqvm mummies for ur help in advance.