Is it common to have pain in your lower back and in the middle of your buttocks area and how long does it last What can you do to help with this?

It is extremely common in pregnancy to have pain in these places. The progesterone relaxes all your ligaments to allow the pelvis to alter shape slightly to allow the baby through. Unfortunately it may relax them a little too much and you may have irritation of the sciatic nerve because your vertebrae are not held in place as strongly as normal. A physical therapist may be able to help by giving you exercises and/or a back support.