Sayang, at 35 weeks dengan perut keras + sakit pinggang yang teruk macam tu, please go see your doctor or go to hospital je untuk check , better safe than sorry, especially since it's your first baby! Perut mengeras boleh normal (Braxton Hicks), but combined with that level of back pain, kena confirm dengan doctor. A few of us pregnant mums had similar symptoms and turned out okay, tapi some needed monitoring, so jangan tunda! Call your gynae or go to labour ward untuk peace of mind. Wishing you all the best, mama!