Scared of going to jail.. here are the facts. let me know if i should be worried!

Scared of going to jail.. here are the facts. let me know if i should be worried?

I had a party for the 4th of july. sometime in the night a 14 year old girl had come into my party without my knowledge. Someone had given her alcohol, well the party nears its end and everyone goes home but me and 4 of my male friends. after we had went to sleep the 14 year old girl returns to my house through my backdoor that does not lock properly. The next morning the cops wake me up asking what the girl was doing in my home. I told them i had no clue. The parents freak out thinking someone had done something to her, took her into a hospital to get a rape kit done. About 4 hours later the cops comes back out and arrests me for contributing to the delinquency. A misdimeanor, upon arresting me he says "it looks like no one has touched her, but i have to arrest you for contributing" So i go to jail. no questioning on anything. So should i be worrying about more than the delinquency charge? And wouldnt we al have been questioned on this by now if there were something else? help plz

i asked my friends mother who is a cop and she said that you shouldn't worry that if it was n e thing else they would have told you by now. but if thats all that happened then there is nothing else they can charge you with and all that should happen is you will have to pay some money.
other than that you should be good to go