Oo mama, yan na yun most likely! Ang iba-iba ng sensations talaga especially once they're bigger na at mas malakas, some moms describe it as flutters, tugs, pulls, parang may gumagalaw talaga inside, so what you're feeling sounds totally normal sa stage mo na. But if you're ever worried or if the sensations change dramatically, better to mention it sa OB mo next check-up lang para peace of mind, kasi alam naman natin gusto natin sure lang palagi haha!