If you are well controlled with pills, I'd highly suggest you wait about this. I'd also get a second opinion on if it's absolutely necessary for a TX, I didn't think it would be if you have good control with something like Nexium...I had one when I was 15 and it's single handedly the worst decision I've made regarding my health and has been detrimental to my nutrition and weight gain. I weighed 130 just before I had it done, and because I was having lots of reflux not controlled by medicine they suggested this.
Now that I have insight on it, I would rather have eye-watering pain from heartburn than deal with the constant nausea, vomiting (or lack thereof) and loss of appetite that I suffered from for 3 years afterwards. A year later I dropped 35 pounds, and still struggle to stay above 100. I'm pretty sure mine has come undone by now (they sometimes don't last long, thank God!)so I am able to eat 2 decent meals a day with nausea controlled by Marinol. I can finally vomit, too. You get full very quick because of the way your stomach is stretched. You can't burp, so there is no way to relieve the acid build up if you drink stuff like soda. You have no idea how miserable you can be when you've just had surgery and you desperately need to puke yet you dry heave for hours in pain. And that's something else I should mention, the pain. For me, it was horrible for the first 2 weeks. I was literally unable to do ANY physical therapy, and I could barely blow on my Flutter.
I don't mean to sound so grim in this, but it's really something you need to reconsider and look into all possible options and opinions before going into this. I wouldn't want my experience to happen to my worst enemy. If you have any other questions, feel free to ask me. I'm pretty experienced in all of this by now.