"Traumatic experience"

It has taken me sometime to decide wheather to put this complaint forward, as i have the utmost respect for the NHS. However ever since my procedure I have been suffering stressful flashbacks of the the event. On my arrival at mount vernon hospital at the Endoscopy unit. I taken into a room where the nurse explained the details of the colonoscopy and what to expect. she then asked me if i wanted sedation, I said yes, she then told me most people cope with gas and air, and that i should be fine with this. I asked her if it was painful, she said not painful, just some people feel discomfort due to trapped wind, and that it would be better for me so i can go home early. so I agreed. Next i met with a female doctor who was to carry out the colonoscopy, she questioned why i did not want sedation, i told her the nurse convinced me i would be ok without, she adviced i have a intravenaos tube in my arm, just incase i can not bear the pain,and so put one in me herself. During the colonoscopy i suffered unbearable pain, I heard one of the nurses telling me to stop shouting as it will scare the patients waiting outside.(i'm sure she was just joking) i was told to let the nurses know if i couldnt cope, but i was unable to talk, it felt i was in and out of conciousness, by the noise i was making it was obvious i was suffering, still the doctors were poking inside me and not stopping, i managed to ask for help, and was injected with a painkiller, (pethadine). Which i felt was too late and the procedure was coming to an end and i could still feel pain. After this i was rolled into the ward, and rushed to sit up, i was given a tea, which i vomitted out, still very confused, sick and traumatised i was told i should get dressed and sit on the side chairs, I overheard the nurses talking about how they needed my bed for the next patient, so out of guilt, and still feeling very dizzy traumatised i got dressed sat on the side chairs and told the nurses i was ready to leave, i just wanted to go home and cry. Trying to forget and forgive, and understanding the nhs is under strain, i tried my best to put it behind me. But i have been, suffering flashbacks and nightmares, It felt very inhumane and a savage attack, it felt like a conveyour belt system. I will never have this done again, i would rather die, i have lost my trust. its a huge shame. The pain if described was like long knives being poked inside me. i am crying even writing this, it has been very difficult, I heard the nurses advising the next patient not to be sedated, too and i went home wishing i had spoken to the patient and wondered about her and prayed for her and so wished i said something. i am finding it difficult to remember, all this to show good waiting times.