Hi thanks for your question.
There could be two possibilities for the symptoms you have described;
in which content of the stomach pass from stomach into esophagus
The other possibility could be Gastritis
caused by H Pylori infection
, though you have taken treatment, but sometime it doesn't get eradicated by treatment.
I would suggest you consult a physician, and get your upper G I endoscopy done, that will rule out or confirm, both possibilities.
Hope this answers your questions