Hello @colinrfc29, I know it has to be difficult dealing with the abdominal pain along with frequent bowel movements and not have any answers. I'm not a doctor and have no medical training but the symptoms do sound a lot like Irritable Bowel Syndrome (IBS).
--- Signs and Symptoms of Irritable Bowel Syndrome (IBS): https://www.healthline.com/nutrition/9-signs-and-symptoms-of-ibs.

You mentioned being on antibiotics for h pylori. You might find this newsfeed article helpful as it sounds similar to what you describe.
--- H. Pylori – Present Management & Future Therapies: https://connect.mayoclinic.org/blog/gastroenterology-and-gi-surgery/newsfeed-post/h-pylori-present-management-future-therapies/

Are you currently on antibiotics for the h pylori?