I had the same symptoms except I had lost about
20 lbs. I ended up in the hospital and had a diagnosis similar to lildidge - UC Flare and Chronic Appendicitis. They didn't want to take my appendix out due to the flare so 6 days of IV antibiotics and IV steroids and I felt much better. They still haven't taken my appendix out though; have they taken yours out lildidge?
I went to 4 different doctors in 2 years who all told me I just had IBS - then the flare led me to the hospital which led me to my diagnosis.