My mum is small too and had cs with both me and my sister she actually had an xray while pregnant to confirm the opening of her pelvis was too small to give birth naturally.
-
There is NO link between the experience of your mother and you. No research has yet established any sort of correlation.
-
Women who are 5ft are not considered higher risk. It is only seen as a problem for women who are considered abnormally short. 5ft is regarded in the normal range.
-
The position of the baby is far more important than your size and has a bigger impact on whether you can give birth naturally. Some positions for labour also favour a natural birth by increasing the size of the pelvic outlet.
-
Xrays have been found to be largely useless in trying to work out if a woman is capable of giving birth naturally.
I spent a LOT of time researching the average as I am pretty much the same size and my mother had a similar experience. What I found really surprised me. If anything I was probably searching for something to back up my preconceptions and beliefs, but it doesn't exist.
However I do understand that knowing this, may help but not necessarily. It also may not offer your the reassurance you are looking for. Humans assess risk both emotionally and logically. It can be incredibly difficult to let go of what happened to people who you know well, because it is closer to you and therefore represents a 'real experience' whereas statistics are numbers that I you have emotional connection with. What you end up doing is trying to get your head round something that is counter-intutiative.
This is why I suggest you try and talk to someone about your fears, as having support and being listened to is probably what you need more, rather than just being armed with statistics. Try and see what services are on offer for women suffering anxiety - I am under the perinatal mental health team at my hospital and they have experience in doing exactly this.
I personally suffer from extreme anxiety with my anxieties going much further and deeper than just these. I am having an ELCS on these grounds, but this isn't necessarily the way forward for everyone. I know the team that are supporting me, have had a lot of success in dealing with women with all kinds of anxiety related issues, and many have gone on to have a natural birth with the aid of that support. It can be an issue about building up trust and talking through the possibility of things going wrong so you have the confidence you need.
There is no right or wrong answer here. Only what you feel happy and comfortable with. If you have anxiety that is affecting you to the point that it is dominating your thoughts and/or giving you regular nightmares and/or stress that you are not coping with, ask for help. Your fears are important and are not petty and should not be dismissed or belittled.
Good luck. I hope you can find the reassurance you are looking for.