Possible failure of Nissen Fundoplication (2021)

I had a Nissen Fundoplication in July 2021 due to hiatal hernia, severe gerd, etc. I had major complications in September 2021 prompting the the surgeon to redo the surgery but adding an "anchor" from the stomach to my abdomen. I've had mild gerd but it has been manageable by meds for 4 years. Recently I got really sick (nausea & vomiting) and since then have had intractible nausea accompanied by frequent deep burping. I'm having an endoscopy next week but am very concerned the Fundoplication has failed again. Has anyone experienced something similar and what was the outcome?
53/F.