Oo normal yan at maraming moms sa amin na nag-experience ng ganitong heaviness around that stage kasi lumalaki na talaga ang baby at uterus mo, plus all the extra weight. But since you're feeling it in a specific area like na, best to mention it sa OB mo on your next check-up para sure lang na walang underlying issue, baka ligament pain lang or positioning ng baby, pero mas okay na ma-confirm ng doctor para ma-ease ang mind mo!