ISS on CommonApp

I got In School Suspension one time when I was a freshman for a dumb reason that I wasn’t very proud of, but it was only one day and my counselor reaffirmed me that it wouldn’t be on my record but I didn’t really trust my counselor all too much and it was a while ago, should I just answer no for schools asking if I have ever been subject to disciplinary action or probably check with my counselor to see if it is on my record and if I have to report it?