Momsh, I can tell you're worried! Please have your OB check this right away, especially at 37 weeks, it's really important to know exactly what's going on with you and baby.
I know a few of us have had concerns like this too, and every pregnancy is different, kaya dun lang talaga sa doctor ang tama na sagutt. Huwag mag-alala, you're doing great by asking! Keep us posted, okay? Sending love.