Hay, I feel you, ang sakit ng balakang during pregnancy is really common, pero if it's to the point na hirap ka na talagang gumalaw, I'd really suggest checking with your OB agad, kasi bawat pregnancy is different at it's better to be sure kung okay lang talaga or if kailangan ng specific care. A few of us mums had back pain din, pero dami-amin kami ng stretches at pregnancy pillow between legs helped, pero honestly sa ganitong level ng pain mo, doctor consultation is the way to go para ma-rule out kung walang iba pang issues. Sending you comfort, mama!