Uy, mama! Okay lang yan paminsan-minsan, pero since 30 weeks ka na, mas safe kung i-check mo na with your OB para sure, better peace of mind, especially first time mo. A few of us moms experienced that din, pero importante talaga malaman kung normal lang or may kailangan i-monitor, kaya don't hesitate to call your doctor or go in agad if meron pang iba pang symptoms or kung sobrang masakit. You're doing great!