Oo mama, yan na yan ang baby movements! Those bubble or wave-like sensations are totally normal at 19 weeks, marami sa amin na first-time moms, parang gas lang o parang may swimming inside, then later pa talaga ang mas obvious kicks na parang nakakatalon ang baby. Every pregnancy is different kasi, so don't worry if hindi mo pa feel ang literal strong kicks ngayon; some of us felt them around 20-24 weeks pa. But just to be sure, better mention it sa OB mo next visit para sigurado lang na lahat okay with baby. Congrats on your pregnancy, and enjoy observing every little flutter!