I lost much more than just 15 lbs, but then I started to eat, and some of the weight came back.
I started to eat on the 7th day, just half of a cheesy bakery, then next day I was gorging on a small amount of chinese-thai buffet. No kidding.
I combine balloon with Weight Watchers (WW), decided to go on 1500 kcal/day, but the truth is that I cannot eat more than 800-1000 kcal/day. I celebrated my 15 lbs weight loss by visiting an Indian buffet, and I did not eat too much compared to my "old self", but it was surely much enough to make me feel bad and nauseated whole day, though did not vomit. I am really thinking to do more exercise than just walking. I feel great and I have energy. Well, congratulations to me for sure. I have been very fortunate throughout my life when I had to handle illnesses (like a few years ago at the oncology), but I certainly always had the right mindset (maybe being an ICU nurse for a few years was helpful, too).
I don't know guys what is wrong with some of you and what causes the constant vomiting (nausea would be fine, I feel almost every day WHEN I am eating more than I should - per the balloon), but I would talk to the doctor, rather than posting here. I got Cerucal on the first two days (did not help though), and some mentioned the patch, which I purchased, but decided not to use, especially when I drive hours to my work, and I do lecture (because this is what I do for living). Reading through all the 1000+ posts, I am pretty sure you are not alone, but no other ballooner would solve your problem, it will be the doctor. I would wait with the removal. It takes 2 days for some people to adjust, it might take 2 weeks for others, and as someone else said it before, it was 1.5 months until s/he got adjusted. I think it is worth to wait! Oh, and get ready, because once you start to eat (when you can hold the food inside), you will be gaining back weight, so don't get discouraged easily. Set a weekly goal. Measure yourself every day to train your mind to help you get closer to your weekly goal. I have a little bit more than 6 months to go (I got it in for 7 months), so with weekly 3 lbs loss (x 24 weeks) will be 72 lbs loss which would definitely will make me happy. I might even think to get a second balloon.
I talk to a friend of mine (anesthesiologist) who told me that he thinks that my vomiting (within 36 hours after the procedure that was done under anesthesia) might have been due to the anesthesia. Well, either way, no vomiting since then, and I am happy. Burps are not that bad (I just clear my throat when I lecture), and did not have any so far today (and it is 4:23 PM). I am definitely happy that I had this procedure, and if you can stick further a little bit, you should benefit from it, too. Good luck.