Sammie, everyone has already done their best to reassure you. You have had testimonials from people who have had the procedure. You have had numerous suggestions on what you can try to reduce your stress and fear.
Among all of the many responses you have received, surely there is at least one which has some good information.
If you would rather obsess and fuss about it, then just admit it. If you want suggestions or solutions to your problem, go back and read what's already been posted.
If you still can't handle it, please seek psychological help.
Meanwhile, here's a little ditty which I think fits the situation. It's sung to the tune of Singin' in the Rain:
"I live to complain, I love to complain,
In sun or in rain, I just like to complain.
I gripe and I groan, I whine and I moan,
I live, I love to complain."