@regalrottweilers I had to look up "SIBO" and this Mayo link explains that it can be caused by a slowing of the passage of food and waste through the intestines.
https://www.mayoclinic.org/diseases-conditions/small-intestinal-bacterial-overgrowth/symptoms-causes/syc-20370168
I know because of the work that I do with my physical therapist, that constrictions or adhesions can affect the intestines and slow them down. Even pelvic alignment affects this if you have an inflare of the hip bones toward your belly. The pelvis is jointed which allows for movement of the bones during birth, but because major muscles connect to the pelvis, it can twist it or pull it out of alignment which can put pressure on the intestines passing though the abdomen. That may be an avenue to explore. My therapist does myofascial release which stretches tight tissue and tight tissue can cause pain. Here is our discussion about MFR. You wouldn't need a specific diagnosis to do this therapy. The therapist can assess with their hands the pattern of tightness in the body and follow that pathway to release it. It may take several sessions or weeks/months for results depending on how tight the body is. It is like peeling off the layers of an onion to find out what the next layer brings. I have had a lot of success with MFR.

Myofascial Release Therapy (MFR) for treating compression and pain: https://connect.mayoclinic.org/discussion/myofascial-release-therapy-mfr-for-treating-compression-and-pain/

There is a provider search at http://mfrtherapists.com/

Has your evaluation included any physical therapy work?