Mama, please go see your OB right away or go to the nearest hospital para ma-check agad, rapid fetal heart rate needs to be assessed by your doctor immediately, hindi ito dapat i-wait!
A few of us mums have had similar concerns, at honestly the best thing to do is get professional eyes on it kasi only your doctor can give you the right answer based on your full situation. Stay calm, mama, you're doing the right thing by asking, but let's get you checked ASAP. Sending you strength!