I'm not an expert with IBS because I actually have IBD. It's good that you are under GI care. Please have all the examinations done. I usually take some pain relief if I really cannot take it anymore. Tramadol has helped me as well as Hyoscyamine. I think you need to get treatment or at least rule out food intolerances.
More info about
SCD you can find here:
www.breakingtheviciouscycle.info it's also good for IBS and any kind of digestive issues really. Try it for a week or so and write a food journal every day. If you do find relief, continue.
Please keep us posted how you're doing. I hope you find some relief soon.