HI Smd7129
I'm not sure if my message will reach you prior to your scope, but if so, I had one last Thursday and I would describe as uncomfortable rather than painful. I felt a lot of pressure but no pain. It's strange to see a camera being inserted into the stoma but as it has no feeling that part wasn't painful either. It did look a bit of a bloodied mess after, made me realise stoma's are indeed very sturdy!
I hope the results for you are positive.
With best wishes
Debbie