Hi mama! Alam ko scary yan, lalo na first time mo pa lang. Please check with your OB right away, hindi kami dapat mag-assume kung ano yan, kaya importante talaga marinig mo from your doctor directly, especially since you're already 7 months along.
A few of us moms get different kinds of pains during pregnancy (ligament stretching, baby movements, etc.), pero kailangan mo talaga ng checkup para ma-rule out kung something else. Don't wait, okay? Better safe than sorry sa ganitong sitwasyon. Sending you hugs, mama!