I am 18 and a week ago i got an underage drinking ticket, what will happen to me?

My boyfriend and i were parked on the side of the rode having a disagreement and for some stupid reason he turned the both of his blinkers on while we were talking. Anyways a cop pulled us over and said that we smelled like we had been drinking. we told the truth and he just let us go with underage drinking tickets. i know that i will have to pay a fine and take some classes but what kind of fine am i looking at? and will i have to do jail time? I’m so freaking scared someone please help!