Hello and hope you are doing well.
The pain could be due to post operative complications like abscess or inflammation. The other causes could be gastritis, peptic ulcer disease and GERD. Disorders of the spleen and colon could also cause pain. Kidney disorders too produce colicky and sharp pain. Sometimes anxiety with flatulence can cause this pain. You will need to consult your doctor for proper evaluation of pain and therapy.
Hope this helped and do keep us posted.
Have you had follow up with surgeon yes? Mine out me on a prescription anti-acid for 6 weeks after, id give the office a call and let them know just to be safe... you might have started eating meat to soon, my surgeon told me not to eat it for the first month and then to ease it back into my diet... I had my surgery in January and i still have issues digesting red meat,