Huhu alam ko yan, ganyan din ako around that time! Try sleeping on your side with a pillow between your knees at one under your belly para hindi gaano ka-stress yung back mo, game changer talaga yan para sa akin. Warm compress before bed and baths na kaunting warm water din nakatulong, plus I basically lived sa matress namin haha, pero honestly mamsh, since may bedrest ka at nagpa-pain ka na, better check with your OB para ma-confirm na it's just pregnancy-related backpain at walang iba pang concerns, better safe na lang bago mag-deliver!