Was it word vomit? Is that why you chose that is that symptom. The reporters seems to be on the cautious side based on how fast you answered them. They eventually let it slide after a few second have passed. New York Times then asked if memory loss was also one of the symptoms but you shut that idea down.
You still are left feeling guilty about responding with the wrong answer. There is a decision to be made about whether you should admit to your wrong response or continue in hope there is no damage done for your answer.