If its not ulcer, then what is it? It started with the usual ulcer sympthons, stomach ache when the stomach is empty. When I eat food or take antacids, the stomach ache goes. It then got worse & started giving me pains in my lower back. 
The condition seems worsened by emotional, physical or even mental stress.

I had a gastroscopy & samples were taken from my stomach, osephagus & entrance of small intestine.
No ulcer craters, inflammations or typical bacteria was found. Also, I am tested for an allergy or intolerance to glutinens, I am ok.

What then is wrong with me? I've taken the prescribed drugs & Omeprazol for some months now, to no avail. I don't drink coffee or alcohol because it hurts my stomach unless maybe I am heavily filled with food.

What else can be possibly wrong with me? Am 26 years old, I've had this ailment for about 14 months now.

Summarized question: What other than ulcer can cause stomach pain radiating to lower back?