Gastritis and little progress for 6 days?

Hi,

For the past three days I've been following all the "rules" like eating a light diet or not drinking caffeine, and every evening my stomach pains come back. Can this be normal?

And before that, I had already been doing it for three days, but unfortunately, I made the mistake of eating negative things on the first day when it was bearable, and the next day I paid the price. But as I said, for the past three days, I've been sticking to everything (except nicotine, although I've reduced that).