It is a normal tissue at the back of the throat.
They are called submucous lymphoid tissue.
It will not disappear.
Next Steps
Try controlling your food portions and ear more frequently to avoid regurgitation.
Also eat atleast 2 hours prior to sleeping at night.
Continue your GERD medication.
Health Tips
In case you don't feel better in 2 weeks feel free to consult privately with a doctor of your choice.