Gastritis just means inflammation in the lining of the stomach.
You might have vomiting with it, but symptoms can vary.
"The signs and symptoms of gastritis include:
Gnawing or burning ache or pain (indigestion) in your upper abdomen that may become either worse or better with eating
A feeling of fullness in your upper abdomen after eating
Gastritis doesn't always cause signs and symptoms."
How are you feeling now? You're stomach has been through a lot, so maybe stick to some bland, non-friend, non-greasy foods for a bit. If things don't improve, continue to work with your doctor.