You know, I really don't think it's all that strange to have a tremendous fear of childbirth. I think I did, not panic, but alot of fear. I just took it one day at a time because there wasn't any going back! There are drugs now that make the worst of childbirth much less difficult than they used to be - don't be a heroine and try going without them! So don't let this fear stop you from having children though maybe you might want to talk to a therapist about it if you think it really is out of hand. A kiddo is worth it all for most women.
Or you may just be one of those people who choose not to have children. No shame in that! The world could do with a few more people making that choice.
Ultimately, it is within your control whatever you decide. Maybe reminding yourself of that will make you feel less anxious.