Maria,Welcome to HealingWell and we are glad to have you aboard. I am wondering if you have seen a GI physician for a dx. ?
Acid reflux is such a common problem that you would thing it would be simple to spot and treat. But sometimes acid reflux symptoms are less than obvious or easy to mistake for something else. There are tests available for Celiac disease as well as many for GERD so do look into further investigation of your sx.
Yes, from my own experience, sx of GERD can change over time.
I am sure you will be hearing from other members of this forum with wise input to help you.
Kindly,
Kitt