Natik/LA: I developed gastritis after taking Naproxen after I had surgery for a ruptured appendix. There is an online forum for gastritis at Daily Strength, I believe (haven't been there in a long time).
Aloe vera gel (not much; can cause loose stools; just a little in a glass of water), lots of water, a very plain, non-irritating diet (lots of soft, cooked veggies and boiled chicken were staples for me), and time passing have made things much better. It was surely hard for me to not eat any spices for a long while! Maybe a doctor or dietician also has suggestions.
Hope things are better in general for you soon.
ETA: Do check with your doctor before taking the aloe vera gel. Some people don't tolerate it well at all. I also took slippery elm and DGL licorice (chewable, from Puritan's Pride). Some things can interact in a negative way with meds, so be sure to check anything out with your doctor before taking it.