Gastritis Support Group
Gastritis is a medical term for inflammation of the lining of the stomach. It means that white blood cells move into the wall of the stomach as a response to some type of injury. Gastritis has many underlying causes, from infection with the bacterium H. pylori, bile reflux, or excessive consumption of alcohol or certain foods or drugs like aspirin.

It seems you have a good plan so do what you feel is best for right now . Two weeks does seem to be such a short time on meds . Perhaps you could call and speak to him over the phone ? I have done that a few times with my dr.
Last Fall when I visited the GI doc last, I told him I'm probably driving his nurses crazy with all my questions! He just laughed and said it was no problem. I think if we have sincere concerns, they're okay with our asking.
Best wishes!