I am scheduled for a gastroscopy and colonoscopy this Friday. I have been given 2 bottles of Fleet soda-phosphate. I have had it before and it is completely foul and makes me gag. Any tips on what to mix it with? I am feeling pretty wobbly about this, as I had an ultrasound yesterday and they saw a large mass in my pelvis. I am having an MRI before the scopes to determine what it is. I have been having a lot of pain, cramping on left side, with pain going down my left leg and into my lower back, since before Christmas, but put it all down to IBS. I'm worried now that it could be ovarian cancer. I had a hysterectomy in 2011, and had several fibroids removed, one the size of a watermelon. It was a very tough operation with a long recovery period, and I'm really hoping I don't have anything sinister. The ultrasound technician said I will definitely have to have it removed and biopsied. I'm worried that the prep will make it worse, especially as I have had constant diarrhoea for over a year now. I've been told that an incomplete prep could mean a bowel perforation so I need to get it into me somehow!