I've done it, and I actually found it tolerable compared to some of the other preps I've done. My first scope was when I was 18 also, and it was seriously one of the WORST experiences of my life. Absolutely awful. If you don't konw what to expect, it is HORRIBLE. One thing I can tell you (that I wish someone had told me) was to not worry so much about
drinking all of what they say to drink. I am small (5 foot 6, 115 lbs) and I am sure that I have NEVER drunk all the prep they say to. Last time I only drank half. I just don't eat much/eat a liquid diet in the days leading up to the prep, and I find that much easier...not that any of this info can help you now. I'm sorry you had such a rough day!
Hopefully you'll get this before you do your next set...my only advice is: try sucking on a lollipop in between sips of your drink, drink it COLD and with a straw if you can so it doesn't get on your tongue as much, and take it slow. When your poo starts looking like what you're drinking (clear--if you can see through it, you're fine and can stop drinking), you're good. No need to suffer more and drink more after that point.
28 Year old Female
Diagnosed with Crohn's Colitis March 2000
Recent possible diagnosis of IBS-D
Tried Meds: Asacol, Remicade, 6mp, Humira, Xifaxan, Apriso, Rowasa Enemas.
Currently on: 35mg Prednisone, 100mg Imuran, Align, Psyllium Seed Powder, Prenatal Vitamin, Vitamin B 12 Complex, Vitamin D/Calcium, Flomax (for urinary retention).