Ive been done gi diagnost and doctor told me i have gastritis and ive been taking omeprazole for more than 6 weeks but my stomach keeps growling should i keep taking omeprazole or stop it and how long ive have to take it?

Fine details will be needed as to what were exactly the findings on your upper endoscopy, if you had one, and how do your current symptoms compare with the symptoms you had 6 months ago. It appears likely at this point that a different condition may be contributing to your symptoms and your gastroenterologist would be in best position to clarify, having access to critical information.