I keep having a sharp pain off and on, on the left side of my rib cage what can cause this. i am generally healthy i have an anxiety disorder..?

Maybe; maybe not: Only a thorough evaluation, physical and psychological, can determine this. Get started with the physical part first. See a primary care physician with whom you have, or can build, a ongoing relationship. If physical issues are unlikely, see a mental health professional.

Get it checked: Your mention of an anxiety disorder suggests you might be wondering if your pain is anxiety related. It COULD be. But, the first order of business is to get it checked out by a physician. Some people with anxieties are hyper attuned to sensations in their bodies, including aches and pains. If your physician doesn't find anything it might be helpful to talk with a psychologist. Good luck!