Good evening, this morning I was due to have my colonoscopy I had one about 20 years ago and although uncomfortable no pain as such!  I had my bowl prep and although disgusting I drank it all! So I was given sedation and as many of you said the Dr proceeded straight away, it was uncomfortable but as he went 'around the first corner' the Dr was pushing so hard the pain was unbearable there was something blocking the bowel  my tears were streaming down my face and needed my angina spray.  Dr removed the scope and said I had to get the procedure repeated urgently but under G A. He (in the short time )saw polys but due to the pain couldn't take biopsies!  With the sedation I had also taken my pain relief (oramorph, paracetamol and my Matrifen patch)  yet I am traumatised and am in quite a lot of pain! 
many idea what could have blocked my bowel?