Hi and welcome to the GERD forum.
May I ask r u on a diet?...avoiding foods that might trigger more acid?.....following lifestyle tips to aid the meds in working, like elevating the head of ur bed?
It is possible that this med is not working for u......did ur dr do tests to see that u deff have acid reflux?....u saw a GI dr?
Too little acid can feel the same as too much, so the meds can be the wrong thing to take if u have too little acid. Proper testing is needed and u may need to be checked for H.Pylori a bacteria that can also cause the symptoms u described.
If u r tested and it is deff acid reflux ask ur dr to try a diff med...mayb a H2 blocker instead of the PPI's.