I was without ibs symptoms for two years. suddenly, i have lots of d again plus new problems including constipation, dark red blood with mucus, daily off/on abdominal pain, occasional fever and nausea. i had an egd done and the gi doctor said no celiac. i

Unlikely: Ibs-type symptoms in mid-twenties female unlikely cancer. More likely recurrence of ibs. See a gastroenterologist for understanding. Keep in mind a mutual association of fibromyalgia & joint hypermobility syndrome in females with ibs. Imo, pelvic joint disorders often complicitous in all these disorders. Osteopath, physiatrist, & physical therapist best specialists to evaluate. If fever go now.

Depends: There is such a thing as non-celiac gluten sensitivity. Also possibility of other food problems. Would do a comprehensive digestive and stool analysis, which also checks for bad bugs and yeast and other things.

Blood & abd pain: You have had a change in bowel habits. Red blood could be coming from lower GI tract and you have had the upper tract check with egd. You really need a colonoscopy as it could be many things but obviously you need to be and feel better. So get on the phone and give your doc a call.