Ay, tightenings at ganyan normal na talaga sa ganitong stage, lalo na kung active pa rin ang baby mo, basta kung hindi painful at hindi regular intervals, okay lang yan! Pero since you're already 37+ weeks, mas maganda pang i-check with your OB kung totoo bang Braxton Hicks lang or may iba na, lalo na if nag-worry ka or may spotting, kasi some of my mum friends said magkakaiba ang feel ng practice contractions versus actual ones pa lang sila nag-experience.