Did I just reverse my healing? Week 2 on PPIs

I felt mid-severe burning in my stomach after meals and I then visited doctor after two weeks of suffering. Doctor suggested PPIs 40mg twice a day.

I followed it and a mid-bland diet. Everything was okay and I didn't feel any pain through 10 days and I was kind of happy with progress. But I had a coffee drink today unaware that it had coffee and I started feeling the same burn (but mild) for 6 hours now.

Did I just reset my healing? Does this work this way? Also I have appointment with doctor tomorrow, should I push them for endoscopy? Or just continue with these meds or maybe lower the dose?