How can test be so different?

Hi, I hope all are feeling well.
For the past yr I have been undergoing many tests. 24 hr Urine positive in small bowel, Gallium PET-neg, CT enterography- positive, gallium PET- neg,. Lanreotide 1st inj, worked well. Took symptoms away. My symptoms came raging back as it was time to get another. 2nd inj. Working well.
I have an appt with surgeon who will undoubtedly won't operate. I don't feel confident and feel I'm at the start again.
How can the test be so different?