HELP Bowel Prep

I started my bowel prep at 1PM (an hour ago) and I'm done w/ 3 glasses. . .trying to drink the fourth glass and I want to puke!!  I have a problem with certain things anyway, but this is the worst it's been ever!  I called my DR and mixed crystal light in to give it flavor, but that's not helping. . .I'm just trying to get it in my system, but what happens if I actually do puke?  Will I not be able to have my surgery tomorrow?  That is the last thing I want to have happen!   Anyone else deal with this?? Thanks, Krista

I did mine with 7 up,don't worry the prep will work...trust me on this...LOL Good luck tomorrow!! Debbie