Hay, normal lang yan! Lalo na pag malapit na ang delivery, ang babies ay aktibo pa rin pero sometimes ang positioning nila ay nakaka-cause ng pressure or discomfort sa iyong pelvis at lower back area, kaya yung "chan pain" mo. A few of us moms experienced the same thing, and honestly it's usually just the weight and position ng baby pushing down, lalo na kapag standing or sitting long. Try changing positions frequently, rest as much as you can, at pag talaga namang sobrang sakit, best to mention it sa OB mo para ma-check properly!