Prepping for colonoscopy -- is this normal?

So today I'm prepping for my colonoscopy tomorrow. I've never had a colonoscopy before. I've already taken one packet of Pico-Salax and had about 4 bowel movements. I'm drinking clear fluids and stayed away from solid foods. But right now, my stomach is still really bloated. Every time I think I'll have another bowel movement I just urinate instead. Is this process normal? Or is there something wrong? I'm feeling some abdominal pain since I'm so bloated.