I think the problem we have is that we just dont see other women giving birth, in real life or on tv. Its considered slightly crude to actually show the vagina opening to allow a baby out, so we find it really hard to imagine that its even possible.
But the logical part of our brain knows that of course it is possible, because every person on this earth exists because it is possible.
A lot of people disagree with me but I believe that watching as many birthing videos on youtube as possible will really help. The first time might be scary but you actually get used to it the more you see, and it starts to become normal to see that women can open up enough to get a baby out without any problems.
If youre going to do it be very cautious of some of the very medical clips cos all the medical equipment is really scary. Search for 'hypnobirthing' or 'natural birth'
One book I read made a really good point. We can perfectly imagine that men's penis' can stretch and grow considerably (sometimes lol) when they have an errection, but we can see it happening, and actually women open up enough to have sex but cos we cant actually see our own bits we dont really know its happening.
THe more tense and stressed you are the more pain you will feel, and if youre really scared, your labour might just not progress cos yourbaby reads your anxiety and thinks its not a safe situation to come out to.
I hope you will feel better about it soon!!!