And there are many and many more happy stories. Go for it, especially if you naturally get pregnant your body is ready for it and can handle it. Do all your tests (you can even do test before if genetic stuff is what you're scared of) and watch yourself during the pregnancy, as far as healthy eating and vitamins intake, and everything will be fine.
What specifically is scaring you? Or just everything? Pregnancy is scary whether you're 18 or 40. But I don't think you should fall until you sort out your mind set or your whole pregnancy will just be miserable.
For every scary story out there, there are many, many amazing stories.