Hi Nansense, Thanks for reading. With dairy you have three options. Avoid it completely, take lactase enzyme every time you consume diary, or try small amounts of low lactose dairy (cream, yogurt, aged cheese, etc.). In your case, there’s no harm in avoiding it for now.
As for the Protonix, do talk to your doctor. One strategy is to wean off the drug taking Tums as a rescue medicine only when needed. Hopefully after implementing the diet, you won’t need any meds.