First, welcome to Healing Well! Glad you've joined us!
Your surgery is far too recent to determine whether or not it has failed.
It's very common to have some "reflux" symptoms during recovery. I don't think there are many who get through recovery without experiencing them. Some are simply pain that is unreleated to reflux...the esophagus is a "dumb organ" that interprets all pain as reflux.
Many have an experience similar to reflux that is actually food and liquid that has been held up at the wrap site. A burp of air can send it up the esophagus and into the mouth.
Until the wrap swelling reduces completely, it can be irregular and not sit properly in place, thus allowing actual reflux. This doesn't mean that your wrap was a failure. I remember "reflux" pain that scared me, and made me worry that I'd had the surgery for nothing, and that I was one of those with a failed surgery.
I worried just like you...and many other members here have as well. Staying on PPIs during recovery is a common practice and one I agree with.
It takes 6 months for the majority of the healing to take place, and most of the remaining healing occurs by the year mark. Four weeks is still in the very infancy of your recovery. You've got a lot of healing ahead.
Your GI doc is probably reacting to your description of a full-blown reflux attack. If that is not what you had, then all bets are off. If you get the barium swallow and all is well (that's what happened to me), then you will know that it is not a wrap failure.
If you can be patient at that point, it's very likely that all these disturbing symptoms will begin to improve.
Be sure that you drink plenty of liquids after eating, to be sure that it all gets through your wrap.
When I asked my surgeon if I could be getting reflux in the early weeks, he said, "Pretty much anything is possible at this point..."If you are getting some real reflux it doesn't mean that you will continue to do so after your healing has had more time.
Hang in there! Let us know what happens.
We're here for you...I'm sure others will be by soon to weigh in.
Again glad you've joined us!