EllieorOllie - please, please do not think that you need to rewrite your birthplan and throw 'natural childbirth' out the window at this stage!!
As a midwife I too would habe talked you out of opting for pethidine at this early stage because it would make you feel sick, knock your contractions on the head and prolong your labour. You may think that an epidural is the perfect choice as it will take away the pain. Yes it might (often leaves feeling of pressure or works better down one side), but it will restrict your movement, slow your labour and itis highly likely that you will not be able to feel properly to push and end up needing an assisted delievry by ventouse or forceps.
Now I am not saying this to frighten you but to help you understand where the midwives are coming from you spoke to.
Being 2cm is really good but my goodness it can be sore getting there. It is so much better for you to be at home in your own surroundings. Paracetamol in association with a warm bath can do wonders. Do you have a birthing ball at home you can sit on? That can help the pain. Rocking your pelvis can also be really good. Do you have a TENS machine? If so, get it on.
Can you use a pool for labour at your unit? I know many women who have had terrific pain relief in the pool and wonderful waterbirths.
As you contract your body produces endorphins which are natural painkillers which also helps you cope.
I have seen women transormed when they realise they are progressing well in labour - you are not feeling that you are going to cope because you have been told you are 'only 2cm'.
You have the right to change your birthplan - ofcourse you do- but please do not jump to requesting an epidural. Try the things I have suggested and when you do feel that you need to go to the hospital, please try the pool (if there is one). If you feel it doesn't help you can go up the pain ladder. Try an injection first before epidural.
You may totally surprise yourself and find that once you are told you are in established labour that you get an surge of being able to cope.
Have confidence in yourself - what you are feeling just now is really common and normal.