It seems like you have given it serious thought and researched why you should go through with it. Have you ever considered the IUD?

I am worried about this crunch-time you are having. You seemed to be rushing yourself to make this decision which is never a good thing when it is permanent. I don't see why you absolutely HAVE to get this procedure now with so little time to recover when you can wait till 2015 and continue using the birth control you are currently on, then you can decided whether you still want to have children by that time. There is always adoption as well. Best of luck.