Had apendectame 2 weeks ago. had yellowish stool & sick to stomach b4. fine 4 2 weeks afterwards, but now am sick 2 stomach w/ yellowish stool again?

Yellow stool/pain: Would follow up with your doctor since 2 weeks post -op may be adhesions/obstruction, not uncommon after surgery and hard to avoid, may be infection, gastritis, gallbladder disease. You may benefit from abdominal sonogram or abdominal CT.

See a doctor: how was your appendix was it infected or ruptured did you take any antibiotic or still taking any Go and see a doctor or follow with your surgeon there is so many possibilities that it is impossible to discuss here