My ebf baby has started pooping 2 times a day

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My baby used to poop 1 times in 4 days. Until he was 14 weeks old. Recently he started pooping once or 2 times a day. And the poop is so watery and runny. Is this normal or should I take him to the doc? He poops daily from like 5 days. Sometimes 1 poop, sometimes 2. He turned 16 weeks today. Help please. I’m so worried