It's ok to be afraid, it means you are taking your health seriously and not blindly following suggestions by others.
Personally, I'm terrified of the ketamine infusions, but that's because I've got a hang up about medications and the stigma that goes with being a long term prescription health user.
I trialled the SCS in November and had the permanent put in December 17th a week before Becky had hers. I had some problems and had to stay in hospital for 4 nights but nothing dramatic. They could only get one lead in instead of two. I know the trial worked for me and because it did, I'm hoping to get a paddle to replace the one lead I have.