I have this pain on the right side of my stomach below ribs.?

What can it be? I was in hospital 2 months ago and same type of pain. I had gall bladder ultrasound, cat scan, and a nuclear med test of gall bladder. The only thing they found was a cyst on my right side. It feels like gallbladder. It hurts worse after I eat. I heard if Its chronic gallbladder test will not show. Is that true. Help!!!!!!!! I cannot take pain anymore.