I fell 2 years ago and broke my right leg.I landed on my butt then turned my ankle while attempting to get up and broke my lower leg in two places. The leg has healed but my lower back/butt are constantly in pain especially during sleep and sitting. I have had an MRI on my spine and hip but not tail bone or pelvis - should I? Have had shots in my butt for pain 3 times. Trying to exercise but seems to aggravate my back.