Hai! Yah, normal je baby yang baru few weeks old berak lepas feeding, their digestive system still learning lah. My few mum friends and I had babies like that too, especially if purely breastfed; some babies poop 5-6 times a day at that stage, no worries. The frothy/bubbly poop though might mean baby getting mostly foremilk (the watery part) instead of the creamier hindmilk, so maybe try to make sure he empties one breast properly before switching, a lot of us found that helped. But since he's only 20 days, best to check with your doctor or lactation consultant just to make sure everything's feeding-wise is going smoothly, because they can assess latch and all that in person. How's he gaining weight and acting otherwise?