I think you made the decision to have surgery because you feel it's what is going to work for you so as others have said be hopeful and go!
Feeling scared is so normal but as it is has been said if you've done all you can on a conservative level and that's not working then you have to reasonably move to the next step that will help you achieve your personal goal to get better.
You had 7 kids and are raising them so this is probably going to be like a vacation to you (at least a little like one)
Best wishes with your upcoming surgery and I say *just do it* (I didn't and I admire people that get it together and do!)!!!