Oo natural talaga, mama! Every pregnancy is different kaya some people show earlier or later, ako kaya parang 5 months na agad when I was just 8 weeks, haha, ang bilis! The uterus grows and there's also bloating, water retention, at hormones doing their thing, so it's totally normal na medyo malaki na ang tiyan mo ngayon. But if you're worried or may unusual symptoms, best check with your OB just to be sure lahat okay with you and baby, yun lang.