Oo, normal yan sa 31 weeks, yan yung Braxton Hicks contractions, parang practice lang ng katawan mo para sa actual labor! A few of us mums noticed ito around that time, lalo na kapag tired, dehydrated, or sobrang active ka. Pero if sobrang madalas siya, masakit, may spotting, or worried ka talaga, mas better magcheck ka sa OB mo just to be safe, mas peace of mind lang talaga.