Yes, this is how often they check my husband. Barretts Esophagus is caused by the acid reflux. Trust in your doctor with this, and it sounds like your medication is working. My husband's doesn't always help, and he has a lot of problems, but no cancer. Keeping the acid under control is key to stopping any further erosion and irritation, and you're doing this. If at any time you start having more problems then let your doctor know as there are other medications you can try. Take care and try not to stress ove this, it just adds to your anxiety.