Aw, yan usually ang baby moving na, lalo na kung later pregnancy ka na! Parang flutter or pulsing feeling talaga, especially pag nakataas ka or relaxed ka. A few of us mums noticed it more pag gabi or pag naka-lie down kami, kaya more noticeable yung movements. But since worried ka, best to mention it sa OB mo sa next check-up para ma-assure ka na lahat okay lang, they can confirm if yan talaga baby movements or something else. Don't stress too much, normal yan sa maraming pregnant mums!