Can’t finish my prep🥴🥴


So this morning I woke up to finish the other half of my prep for my colonoscopy later. Problem is I could only drink one cup this morning and feel so nauseous and awful that I can’t take anymore. My bowel movement has become pure yellow. I can’t reschedule and do this again but I have only completed half of my prep and one cup or less this morning. Has anyone gone through this before ? Have you done a colonoscopy without finishing the prep? (Note: I’m 23, and have no history or colon cancer, my doctor wants to check out a hemmeroid and possibly band it)