Alamak, tu memang ligament pain dan pelvic girdle pain yang common dengan twin pregnancy, terutama towards the end, hormones lepas relaks semua ligaments, plus extra weight tu memang torture la! Sakit tulang keletuk tu is totally normal tapi kalo dah sampai susah gerak and bunyi-bunyi tu, better check with your gynae or physio ASAP, especially since you're 35 weeks and mungkin dia boleh recommend some relief (pregnancy-safe stretches, support belt, or even pelvic floor physio work wonders!). Hang in there, tinggal 5 weeks lagi, kecik hati!