Colostomy partial blockage and back pain

I have had my colostomy for over 3 years now, had a complete blockage of the small bowel after first year that required a hospital stay. I was good then for a while. This year i am now on my second episode of a partial blockage. During which i feel my colon ballooning have about 5 hrs of the worst waves of cramping ever then diarrhea..it then seems for that day i am ok, only to wake the next day, try to walk and collapse due to severe lower back pain that radiates down my thighs, buttocks, groin, to my stomach and kidney area.

Its been a week now and i can barely walk or transition from sitting to standing up I went to hospital on the first incident, was given morphine which brought immediate relief. The pain eased up within a few days.

This time its not improving. Is this something anybody else experiences? The hospital said last time they believed it was my bowels causing pressure on nerves in my back.