Braxton Hicks boleh datang lama jugak, but kalau sakit every half hour nih kena follow the pattern, if they're getting closer and stronger and lasting longer, that's more like the real thing lah. Since kami dah around 9 months pregnant, sayang jangan tahan je, better call your doctor or go to the hospital to check, at least untuk peace of mind kan, sebab bukan main heavy contraction ni dah setengah jam sekali! One of my mum friends masa labour juga was same timing, turned out she was already 5cm dah, so better safe than sorry la.