Ay alam ko yan, first time mom worries! Ligtas lang yun usually, ang ligaments mo ay nag-stretch na to accommodate baby, kaya may tugging or tightening sensation, pero if the pain is sharp or may spotting, best to message your OB agad lang para peace of mind mo. A few of us sa mommy group namin had the same thing around that time and normal lang siya, pero lagi kaming nag-follow up sa doctor para sure lang, kaya don't hesitate to ask yours, that's what they're there for!