Ang experience mo is actually common sa maraming moms, lalo na pag approaching na ang due date, yung Braxton Hicks contractions na grabe noong earlier weeks ay nagiging mas mild lang, which is normal! But honestly, since you're at 37-38 weeks na at may VBAC plan, mas better talaga na i-mention mo sa OB mo yan in your next visit para ma-reassure ka lang na lahat okay at normal progression lang ito, kaya don't worry too much. You're doing great with the walking and yoga ball pa lang, keep it up pero take it easy din!