I am a midwife and also someone who (prior to becoming a midwife) with my first baby went from 1cm to a baby in my arms in less than 2 hours.
My thoughts on you not being examined on the antenatal ward are that if you were 2cm when you were last examined and not much had changed with your contractions or behaviour there would be no indication to examine you. If you straight out asked me to examine you then after explaining the risks of repeated examinations, the potential of accidently breaking your waters ect I would do so if you consented but I would not offer an examination unless you showed signs of progression due to the associated risks and potential interventions that may follow. It sounds like once your behaviour did change that is when you were examined.
It is difficult as we are taught by 'textbook' labours, of course we know that not every woman is textbook so a lot of the time judgement, intuition and experience comes into play but typically a first time mother will not progress unless regular contractions lasting a significant amount of time and painful enough not to be able to talk through.
BUT....
I know what it is like. My first baby I was induced. I went from laughing and joking to the exorcist in around 30 minutes. I needed to push. I was declined gas and air as 'I wasn't in labour' and shouted at that my baby was back to back and it was his position that made me want to push (back to back). In the end they offered an epidural to stop me involuntary pushing, I agreed as I thought I was failing! The anesthetist took one look at me and told them to examine me prior to the epidural, they wouldn't as my waters had gone and said was an infection risk. He escalated it and they examined me....his head was nearly out. He was born 16 minutes later and actually born back to back and it was around 2 hours from my 1cm examination and about an hour and a half after the 1st contraction (and I needed to push for an hour of that time).
Midwifery is a work of art. It really is. Science and biology can only tell you so much about a womens labouring body.
Ask whatever questions you need to at the review, but just be prepared they may not have the answers you are looking for!
Hopefully time will have you come to terms with what happened, tbh 7 years later and now a midwife I am still traumatised by mine even though everyone tells me I am so lucky to have such a quick birth, I didn't feel it. You can feel however you feel about YOUR birth. How you felt can't be compared to how it was observed or to anyone else's. What you felt was traumatising, to someone else it may have been lovely. I see what I perceive to he horrific births all the time (I work usually on labour ward) but the woman is over the moon and others I think were beautiful perfect births and the woman is traumatised.
Anyway, enough of my ramblings! Hope the birth review and some time come to heal you.
Congratulations and enjoy your little one!