How to cope when waiting for official diagnosis?

I finally scheduled a colonoscopy after 6 weeks of symptoms. I have to wait several months, and no treatment in the meantime. I’ll have to wait 2 weeks after that before getting treatment as well since I won’t have my GI follow up until then. How do I cope with the stress of waiting while my symptoms progress? Does anyone have any stories of advocating for themselves to be bumped up sooner?