Pulled rib muscle?
Are you sure it's not pain in your kidneys? Just asking. As it could be a UTI that's gone up. That's around the lower portion of the ribs. If it is a pulled muscle, it seems like there's not much you can do that you're not already doing (heat, ice, chiropractor, resting it). And give it a chance to heal. Have you tried Advil or tylenol or anything for the pain at night?