I accidentally ate a small piece of cheese that had mold on it. what should i do?

Nothing: Generally eating a small amount of moldy cheese will either do nothing or cause an upset stomach. Still, not a good thing to do, especially with a soft cheese.

Take a deep breath: If anything , the anxiety you are experiencing will likely cause you more problems than consuming the cheese mold. Don't fret- the stomach acid in your body will be enough to destroy it. You can be reassured that you will be fine.