Hi Kim . I've had right sided pain for almost 3 years now. It's affected my life majorly .
I have been through all the tests also and nothing has been found. My pain feels at times like the spot over the appendix is on fire. Other times it's closer to the hip and lower. Always there but varies in severity. I feel for you.
Let us know how the colonoscopy goes. Hope you find some answers.
Take care, Softy