I feel like blacking out when ever I move.

I suffer from sacroiliatis. I am diagnosed and confirmed from an MRI. I also suffer from "minor fractures" I can't remember exactly where they are but in my lower back. I began working out with a trainer and had some relief from pain during this time of having a trainer the pain was defiantly minanized. How ever I recently went on a trip to Alberta (made time for rest stops so I could stretch) how ever my dad was driving and had to swerve aggressively to miss a dear on the road. Since then my pain has increased a lot!! It began right after the aggressive swirveing. Since then I've made my way home and tried to rest it off and resume working out. my pain has now gone from my right side only to both sides of my back and sometimes waves of pain through my stomach back hips but and legs. I feel like blacking out when ever I move. Laying down causes me to feel like blacking out throwing up. I saw a doctor yesterday who told me their was nothing more they can do but rest and pain killers