In the past, I've had much trouble holding on to jobs because the tendency is to call in sick too much. I do have an anxiety problem, and sometimes I get to where I'm having all of the symptoms of a stomach virus. (I won't go into detail.) Then I call in sick, and end up losing the job. I'm sure a lot of it is triggered by anxiety, but how do I tell the difference, and how do I overcome it long enough to keep a job?