Hello Mara, I'm so glad that you have reached out here. You've taken a big step in realising it is time to do something about how things are right now. I'm guessing that the pain of the slipped disc started a lot of this but also it sounds like you have lost confidence in yourself.
Please use this website as a self help tool and I also urge you to seek help through your doctor. You might consider therapy to facilitate change. Let us know how you are.