I was on antacids since 4 months . i've stopped medicine since july . now i feel heartburn and drink baking soda , burning increases what does it mean?

Antacids: Change your stomach pH and bacteria, you have to wean off them

Antacids: The reason you were tanking antacids may have re-occurred . I would see a physician to ge a proper diagnosis and treatment

GERD: Gastroesophageal Reflux Disease is when stomach contents come up in to the esophagus too much. Reflux becomes a disease when it damages organs (esophagus, vocal cords, lungs), or when it negatively impacts your lifestyle significantly. Need some testing to sort it out. Start with your primary care, and may need a referral to a gastroenterologist. Hope this helps!