Uy mama, yan ay something you really need to ask your OB about right away, ha, better safe than sorry, especially at 37 weeks!
I know it's nerve-wracking as a first-time mom, pero honestly the safest thing is to get checked so your doctor can tell you exactly what's happening with your body. A few of us mums have had different experiences, kaya mas better if your doctor sees it or you describe it to them exactly. Wag mag-worry lang, you're doing great by asking and being alert! Keep safe, at pag may doubt ka, don't hesitate to call your OB or go to the hospital na. You've got this, mama!