Is it possible to get an underage drinking charge expunged before 21? (in PA)?

yesterday I got an under age in Pennsylvania. I'm 19 and was caught drinking in public (I know very stupid) I was also breathalyzed before receiving the citation. The thing is I'm an education major at a college and anything on my record will not let me continue my ed cles. Is there any way possible I can get the charged dropped if I get a good attorney?