Sayang, chills dan body aches dalam early pregnancy boleh jadi normal, but since you're having quite a bit of pain in your lower back and hips, it's best to check in with your doctor or midwife soon, just to make sure everything's okay. They can properly assess what's happening and give you the right advice for you.
In the meantime, try to rest as much as you can and stay warm, ye? Take care of yourself.