Hi so I am in the hopsital as I write this as I was up all night and couldn't sleep because of reading horror stories about this procedure. I'm based in the UK. They offer gas and air and very rare do they like to provide sedation but it is an option I told them how severe my anxiety was and was noticeable scared and upset. 

Now this is just my experience and I totally understand people have had horrible experiences from the story I read. 

I went in with already inflamed side pain. Had the enema and that wasn't as bad as expected for me. Literally pooed in 2 minutes and that was it. I had been following a liquid diet beforehand. 

Now the procedure I was so scared crying before it happened but the staff reasurred me. They gave me light sedation and honestly I think I would have been fine on gas and air in my experience. After reading such bad experiences I chose sedation and I know this procedure could have gone another way. But apart from a churning in my tummy and an oomfh sound when they turned the camera that was it. I had literally lost so much sleep and built up anxiety. I am in my early 30s.

I'm not ssaying the experience will be the same as someone did say at the hospiral that some people experience more pain than others. So I still like when reading other forums went for the sedation. But i wish I hadn't worried so much