Pain in the spleen area, already have had tests run for pancreatitis and lower and upper endoscopy. Ct's from a couple months ago were nomral. I am experiencing stabbing pain in my left side, just under my rib cage which radiates straight down my abdome

Muscle spasm. Upscale spasm of the abdominal wall (or muscle strain, tear, etc.) can ALS be a cause. Sometimes people will even feel a bulge which sounds like a hernia, but may in fact be the contracting muscle. Usually the area is manually massaged, and there is pain relief after a few minutes. A ct scan should be able to tell the difference, but it is very unlikely to be a hernia in that area. Try aspercreme.
Pain . You need to be seen by your doctor and have your images reviewed , if the pain is severe , please go to er.