Sounds like you need a trip to the doctor. Have him check for GERD. If you have acid more than a couple of times a week, it's probably GERD and you don't want to let that go on because it can cause damage to the esophagus and then you open yourself up to all kinds of problems. My doc put me on Prevacid. I pill per day. Works!!! No acid at all even after pizza- I have had acid troubles for about 25 years. I went from tums, to pepsid, to tagamet, to zantac, to Prilosec and now Prevacid. I finally found the trick. Good luck but go have it checked out.