Aw, normal lang yan sa 37 weeks, mama! Most of us moms experienced that kind of cramping near the end, yung parang nag-come and go, hindi consistent pain lang. Pero since it's your first time and you're worried, mas better talaga to check with your OB just to be sure everything's okay, especially if the pain gets really intense or may ibang symptoms like spotting or fluid leakage, peace of mind is so important ngayon, lalo na malapit na naman! You're doing great, at excited na kami for you.