Braces off...uh oh...?

I get my braces off in exactly one week today. I'm excited, but also kind of nervous. I've honestly forgotten what life was like without braces. I've had them on for 3 1/2 years. I've heard the process to get them off goes a lot faster if you've had them on for a lot longer than normal. First of all...I'm worried about if there will be any pain. I'm usually pretty good about dental work. I don't mind the fluoride mold things, or the drills etc. Is it at all painful or uncomfortable? Also, I'm worried that there will be stains on my teeth. I don't floss, but I do brush my teeth twice a day everyday. Will this be enough? I don't drink coffee, and I drink, at the most, 6 cans of pop in a month, sometimes a lot less. What can be done if they do stain? How long does it take to brush away the stain? Or do you have to get your teeth whitened? And also, I haven't told anyone I'm getting my braces of except for my family....cont.