Totally normal, mama! At 19 weeks, especially kung first time mom ka, ang movements ay super inconsistent pa talaga, sometimes malakas, sometimes parang wala for days, kaya don't worry. A few of us first-time moms din didn't really feel consistent movements until 20-22 weeks kaya baka next week or two mas mapapansin mo na. If you're worried talaga or kung by next month super walang galaw pa rin, better ask your OB during your next visit para sa peace of mind!