Eh, normal je sis, tu Braxton Hicks contractions, practice contractions yang perut jadi keras sesekali, ramai pregnant mums kena especially masa trimester ketiga macam you sekarang. A few of my mum friends cerita yang they mulai rasa from 20+ weeks onwards, so 26 weeks perfectly normal lah, but kalau dia sakit betul-betul or ada bleeding, or contractions jadi regular dan frequent, better check with your doctor ya, just to be safe!