Girls ? I really wanted to know, does sexual life affect how successful…

Girls ? I really wanted to know, does sexual life affect how successful childbirth will be? I have no sexual life and consider it non-existent I got married after half a month I left my husband. And from the first time I became pregnant?? Now they say I have a narrow pelvis and a large baby Here I am afraid of the child, what if he doesn't pass through me (( Even when they take a smear, I almost die ?? What should I do with this?