Sudden onset of symptoms - stomach cancer

Hello,

Around Jan 5 I had three days of diarrhea (ugly but no blood and otherwise normal) with a viral bug.  I recovered but then lost my appetite.  Since I have been eating little, I have been losing weight (I could afford to lose a few pounds) at about 1lb per week, 6 pounds total.  I don't have any upper abdominal pain, either before or after eating, but I don't have much of an appetite and sometimes force myself to eat.  I am an otherwise healthy 42 yo male.

I have also been depressed and very stressed (job loss, etc).  I want to attribute the lack of appetite and weight loss to stress and depression, but I am scared of stomach cancer.  Anyone have any thoughts about this?  I am scheduled for blood work and endoscopy next week...

Thanks