Scared.10 lb unintended wght loss.poor appetite.cant gain.many tests.all normal including colonoscopy.very worried.what can i do?what could be wrong

Many causes for weig: Such weight loss can be caused by benign conditions like hyperactive thyroid(thyrotoxicosis), malabsorption, or emotional disorders like depression. Lastly it could be due to cancer. You need to seek a second opinion unless your first doctor is still pursuing the cause of your weight loss. I would suggest further investigations/tests from an internist who can check you thoughly for likely causes.