I have a stock that I didn't personally sell but somehow it still says its sold and I lost only 13.88$. I didn't report it, so I'm just curious if I will get in trouble?

[Critter]

If you had an entry on the 1099-B and you did not report it then expect a letter from the IRS if you do not amend the return first.   I suspect you had stock options that were reported on the W-2  and again on the broker statement which correctly show a loss of the broker transaction fee. 

If the sale was not covered then the IRS only gets the sale info and not the basis info which will generate an audit letter.   You could wait to answer it then or amend now. 

And I think you need to ask the broker what happened if you don't know like why was something sold without your permission.