Aih mummy, dua-dua tu memang common dalam trimester 3, but better check dengan doctor tau sebab banyak sebab dia boleh jadi, some of my mum friends experience pening from the extra weight and hormones, tapi ada jugak yang boleh jadi something else like blood pressure changes. Sakit belakang especially memang normal sebab baby dah berat dan posture kita berubah, tapi if it's severe atau consistent, don't take chances lah, inform your gynae or midwife so they can check you properly, ok? Hopefully just normal pregnancy stuff but better safe than sorry, especially first time!