I too had no pain relief and it hurt a lot! My LO was out only seconds after the cup went in as well - all in one go! but it's not the pain that bothers me months on it's the time it's taken to heal physically. I too picked up an infection from it - a bladder infection that took 3 rounds of anti-biotics to clear and it's taken about 6m to feel normal again and not 'achey' down there. You never get told of these things and no one I know has had to have ventouse.
It's only now that I feel physically healed that the negative emotions have set in.
My whole labour leaves me feeling a bit

. I had to be induced due to reduced fetal movements so my labour was really quick but thankfully not too painful but it was tense and rushed because of the circumstances right from the start.
The only good thing about the birth was that my LO was born pink and screaming so I got to hold her right away before the cord was cut.