Ay, sis, 16 weeks pa lang kaya totally normal yan! Most moms don't start feeling proper kicks until around 18-20 weeks, so those bubbles and butterfly feelings you're getting are likely baby practice moves, super exciting na yan! With my first I was paranoid din na walang kick pa, but then suddenly around week 19 biglang parang may karate master inside, haha. Just relax and enjoy this peaceful phase while it lasts, promise mas intense pa yan soon!