Sayang, kalau rasa keras dan senak tapi interval selang 1-2 jam tu mungkin Braxton Hicks (practice contractions), super common dekat trimester akhir! But since you're close to due date (8/11), please call your doctor or go to hospital tau , biar dorang check betul-betul, especially kalau first time, tak payah risau, better safe! A few of my mum friends also went in masa rasa mcm tu, and dorang dapat peace of mind je. Contraction betul usually consistent dan slowly get closer together + painful, so doktor akan tahu jugak.