Abdominal pain. Pain starts instantly.

Ever since i stopped drinking n smoking (6 months) i started having anxiety n abdominal problems. My doctor suggested nexito plus for anxiety problems n m getting relief from it. But im getting pain in d right side of abdomen below the rib area. Pain is more after i eat/ sit. I get like cramps, pain, numbness n light bowel movements in that area. If i lie down on bed the pain will decrease. I have undergone all tests like CT ABDOMEN, ENDOSCOPY, 2D ECHO, ULTRASOUND, AEC, BLOOD, TMT, everything is negative. My doctor suggested me to use RABEKIND and NORMAXIN but im not getting any relief. Im worried about my situation n it is making me sleepless n anxious. Please suggest any remedies or further steps. I have visited many doctors in the last 6 months but of no use. What could be d reason for this pain. Please note d pain is more prominent after i eat anything. The pain starts instantly.