Anak, please see your OB right away or go to the nearest emergency room, contractions at 26 weeks need to be checked immediately by a doctor, hindi ito something to wait out. A few of us moms have been through scares like this, and the doctors really need to assess if it's Braxton-Hicks or something that needs attention. Mas safe na ma-check agad para sa peace of mind mo at ng baby. Take care, and let me know how you go!