Panicking 😭

Hi guys. I've been putting off a colonoscopy as long as I could, but despite being relatively young (early 20s), my doctor is basically requiring it now. I'm so so so terrified. They're having me take Gatorade, Myralax, and dulcolax. I'm terrified for the dulcolax. I've heard it causes so much nausea and puking and it did for my mom when she took it which makes me scared because I get nauseous way faster than she does. I just can't imagine going diarrhea and feeling horrible while vomiting 🥲 Due to my weight, my doctor said they're giving me the prep they give for kids but it made me feel worse because my mom also had that prep and felt awful anyways. Does anyone have advice on how to get through this or what diet I can follow so I don't go more poop than I have to? I'm so miserable with my current GI symptoms so I know I have to just get it done, but I'm so scared.

I'm also just panicking about having no control over my bowels. I know it may sound silly but losing control really freaks me out and I'm afraid of waking up during anesthesia and I'm just spiraling. Not to mention the idea of pooping clear/flakes makes me want to gag for some reason 😭