Forgot to update change in income for Medi-cal. I'm an idiot. How to fix this?

Sorry if this is in the wrong sub. If so, please direct me to the proper one.

When I was unemployed, I got approved for Medi-cal in July 2014. In Feb 2014 I got a part time job that pays $7,000 a year. It just occured to me today that I'm supposed to tell Medi-cal changes in income within 10 days. A year an a half later I still have coverage. Am I in trouble? What's the best way fix this stupid mistake?

I'm going to call Medi-cal, but I just want to hear everyone's opinions first.