If you are having issues keeping food down you should seek the advice of your bariatric surgeon or a second opinion from another bariatric surgeon as soon as possible. There is no way to reverse a sleeve gastrectomy because the large portion of the stomach was removed. If you have a stricture or a twist it can sometimes be fixed with endoscopy and a stent or sometimes requires conversion to a sleeve gastrectomy. It is important for you to seek the advice of a qualified bariatric surgeon to get to find out why you are having problems right away.
Unfortunately any previous gastric surgery is a complete contraindication for all of the gastric balloons on the market including Orbera, Reshape, and Obalon. You should look into a comprehensive weight loss program or surgery if you qualify. I wish you the best of luck.
I would get a second opinion from another bariatric surgeon to perform an endoscopy to see if the original sleeve was performed correctly. If they made your stomach too large this can lead to the poor weight loss. You should have never even had a sleeve gastrectomy with a BMI of 32. The criteria for sleeve gastrectomy is a BMI of 40 or greater or a BMI fo 35 or greater with at least one medical problem related to obesity.
Yes, you can convert a sleeve gastrectomy to gastric bypass. Depending on your insurance and BMI, insurance may cover your procedure. Self pay prices vary throughout the USA. I suggest you consult with a bariatric surgeon in your area and discuss your options to obtain pricing. I wish you the best of luck on your weight loss journey.