t have two separate conditions causing this- Diverticulitis and Diverticulosis do both explain the
fever and chills, and the blood.
Colon spasms are absolutely miserable, but you might benefit from treatment using Belladonna extract- talk to your doctor about it. I went through a yearlong period of colon spasms when I was under heavy stress in college, and Belladonna was good for mitigating the symptoms.