I guess you are on antibiotics. When I had ulcers a long time ago you drank milk and did not eat anything hard to digest. Just my experience.

Go gluten-free. Gluten may be irritating it... Or even causing it.

I know its frustrating having to wait for the surgery, but be glad they found it. I'm an Endoscopy nurse and a recent sleeve patient. What meds do they have you on? The ulcers will clear up with proper antibiotics and prescription strenth ppi's. If left untreated they could cause pre-cancerous cells leading to cancerous cells over time if undetected. It was a blessing you decided to have this surgery. Also after your sleeve when you have only 15-20% of your stomach left, most of the areas that are ulcer prone will be removed so reoccurence of the ulcers are unlikely. Look at this as a good thing. It could be worse my husband went in to be sleeved 2 weeks ago and when preping for the surgery they found a heart arrythmia on his EKG. He was soooo dissapointed. Again we are so lucky he decided to have the surgery because we had no idea. Now he is getting treatment, under control, and will be sleeved in one month.