Im 19 Years Old And My Memory Has Gotten Real

Im 19 years old and my memory has gotten real bad. I forget just about everything if someone tells me to do something I forget what they told me the next minute. Or I just forget the whole thing until they bring it back up or ask me again. I always seem to forget important things. Now its kind of affecting me at work if a coworker of mine asks me to do something I always forget. Im constantly lost in space alot. Is this something to worry about or just a really bad memory?