How bad is a harassment citation?

I was at a party a few weeks ago and one of my friends was threatened by someone. Standing up for my friend, I confronted the person which led to an altercation and I flashed a pocket knife. The person backed down and I left but the police were called. I didn’t touch the person in any way but I may be charged with a harassment citation. Neither of us are minors. How severe could this potentially be and what would the worst case scenario be? What does this mean for me as far as a career goes, wanting to work in nursing one day?