Sayang, at 37 weeks dengan sakit macam senggugut, sakit punggung, and that thick discharge, please call your doctor or go to the hospital today, okay? Better safe than sorry, especially bila dah dekat due date. Ini bukan boleh tunggu-tunggu. A few of my mum friends experienced similar things closer to labour, tapi some turned out kena check-up urgent. Don't risk it lah, get yourself checked properly so they can make sure baby is okay.