(Concern) I am in pain due to chronic atrophic gastritis.

Last year, I had a health checkup and was told I had chronic atrophic gastritis. But at that time, they didn't prescribe much medication or say much, so I thought it might be okay. Usually, when I have stomach pain, taking something like GeForce is enough. However, recently, after overeating and getting indigestion, I've been suffering from stomach pain. When I looked into it again, I found out that if chronic atrophic gastritis worsens, it can progress to stomach cancer. So, I've been taking hospital medication for two weeks now, and I feel like it's getting better... but since yesterday, I've been experiencing bloating again... I feel really uncomfortable, and I can't digest well... That's how it is. Yesterday, I also ate porridge, but maybe I ate too much... Now, I realize I shouldn't overeat even on porridge...ㅠ.ㅠ