Alah, sakit punggung masa pregnant memang very common, especially around your stage sebab baby dah besar and the weight shift ke depan, a few of my mum friends complained about this juga. Frequent urination pun normal, especially bila baby pressing on your bladder, tapi kalau sakit or buang air kecil tu disertakan dengan burning sensation atau ada symptoms lain yang weird, better check with your doctor just to be safe, okay?