Go to your doctor and ask for something stronger than Pepcid or Zantac. There are better things that will help. PPIs for instance. Or course, that is up to the doctor to determine but they do a better job than what you are taking.

These drugs can take up to a week or more to become effective but when they do you should have no problems if what you are suffering from is acid reflux.

If you are dealing with an anxiety issue, then that will have to be addressed differently.