You're certainly not alone in not receiving proper preparation for what your recovery would be like. I'm finding that it's not the exception, but seems to be the rule.
If my calculations are correct, you're just a little over 3 weeks post op. Having difficulty with swallowing is not at all uncommon at that point in your recovery. It is not right that your surgeon did not prepare you for what to expect, but at least you've found this forum, where there are many people who have gone through the surgery, and know exactly what to expect.
While every recovery is unique, difficulty swallowing is very common. You most likely aren't vomiting up the food, but rather, it's getting held up at the wrap site, and you're regurgitating it from there. Some here have compared it to a cat coughing up a hairball. I think it's a pretty apt descript
There can be a lot of swelling in the early stages of healing, and it's likely that your wrap is swollen, and therefore it's holding food back.
I was started on a liquid diet, then soft, then solid foods that could be chewed to a complete liquid. I was warned to take small bites and chew to a liquid each time before swallowing. My surgeon said that soft food wasn't necessarily the answer, because as he said, "A bolus of mashed potatoes could get held up in your esophagus."
I think it is jumping the gun to go right to an endoscopy at this point. I was told by my surgeon that my esophagus would become progressively more swollen until about
the two week mark, then begin to go down. As I said, everyone is unique, and our bodies respond differently to surgeries.
Keep in mind that your upper GI tract underwent a complete revision, and it will take time for things to settle into place and swelling to subside.
Please don't assume that because you're having trouble now, that you always will. In the early weeks, I could only nibble small amount of food (my son said I acted anorexic), so it's not abnormal to have difficulties with eating in the beginning. I can tell you that I can now eat anything I want, and although I am still careful to chew my food, enjoy food thoroughly.
Try to be patient, and don't panic. Things will get better. You're at the very beginning of your recovery, and you've still got a long road toward full recovery. A more experienced member of the "Wrapped Club" told me that most of the healing takes place in the first six months, and the rest over the course of the first year. I went on vacation at the four month mark, and enjoyed eating whatever I liked at restaurants we visited.
Better times will come.
Please stick around, and ask whatever questions come to mind. We'll do whatever we can to answer them, and support you through your recovery. I wholeheartedly agree that surgeons need to give more information regarding the recovery process and what to expect.
Hang in there! Things will get better!