Recently Pulled My Lower Back Out. Today Further Injured Boney

Recently pulled my lower back out. Today further injured boney area of lower back on right side and the boney area is protruding a bit. The pain is severe. Have seen a doctor after my lower back has gone out and was treated on a few occasions with pain meds and once with a shot to the area. This time is different, lower back is bad plus the additional injury to right side with bulge in bone just above and to the right of coccyx bone. What can I do to relieve some of the pain? Have soaked in bath with Epsom salt and used heating pad with no relief.

I am on public assistance for medical and cannot afford the $15 fee.