Sayang, at 33 weeks it's very common to have back pain and lower belly discomfort, your body's carrying extra weight and your ligaments are stretching to prepare for labour, so that heaviness is normal lah. But since you're mentioning the pain is frequent and bothersome, I think it's best you check in with your doctor or midwife just to make sure everything's okay and get proper advice for your comfort, ya? They can also suggest safe ways to ease it like proper posture, support pillows, or gentle stretches. Take care of yourself, mama, these last few weeks can be tough on the body!