One class to one competency.
Not so. Competencies are listed on class syllabi. A competency does not match just to one class. Competencies will map to several classes.
See: Competencies matched to classes
I must have a class that lists the competency
Not so. You are being asked to show that you understand the meaning of a competency and can tie evidence to support that claim. Evidence from any class that is relevant can be used. The evidence might be assignments in a class or classes where the main focus was not on the particular competency; but some of the assignments support the competency.
I am in trouble if I haven’t taken a class that relates to a particular competency.
Not so. You can use examples from work or a previous career (as long as no more than 2 years old). You can even produce new evidence by doing research and presenting it.
Best Advice
After establishing your e-Portfolio advisor’s expectations pick a competency that appears easy to you -and get started. If you get started you will feel better and the task will not seem overwhelming. Again -think of it as a job. No-one values an employee who isn’t a self starter:-) Leave the angst for another day:-) You can all do this.