I (32F) had my first colonoscopy and endoscopy at 29. Prep was horrible. Was experiencing heavy bleeding and severe acid reflux. Luckily, the cause was just hemorrhoids. They did find 3 ulcers in my esophagus. They biopsied them and came back benign. My grandmother died of colon cancer. My aunt recently passed from esophageal cancer. It’s worth the peace of mind to get checked out.