Mommy, normal lang na tumaas ang heart rate during pregnancy, usually between 70-100 bpm, pero pwede pang mas mataas, up to 110 bpm na, lalo na sa third trimester kasi ang body mo ay gumagana ng husto para sa baby mo at sa sarili mo. Pero honestly, better check with your OB kung worried ka, especially if may unusual symptoms like dizziness or shortness of breath, one of my mum friends had palpitations sa third trimester and the doctor just monitored her closely, so it's worth a discussion sa prenatal checkup mo para peace of mind!