Colonoscopy. Terrified!

Hey guys, so i have hemorrhoids but have had more bleeding than usual and my doctor insists I go through colonoscopy. The whole idea scares me. i have no idea how I’ll take it. The fact they sedate you. All of it. I’ve been feeling dizzy after losing this blood. They told me I had anemia again after testing me. I’ve had both anemia and hemorrhoids for years now (they flare up they go away) and after googling stuff it turns out it can be connected for the worst. My doctor also told me “a personal story” of her friend who got diagnosed with cancer, had bleeding, but thought it was nothing. I’m dead here. Anyone experiencing the same and can calm me a little? I have such anxiety and cannot sleep.