Honey, Please go home. Im sure theres going to be alot of different emotions between all of you but your parents are the best bet. They'll be able to take care of you, take you to Doc appt's and I'm sure you'd feel more comfortable knowing your in your own bed at night with people that love you.
PLus your underage anyway, you dont want your boyfriend to get in trouble in any way shape or form with the law do you? I think it'd be best to avoid cops..Keeep your life as stress free as possible.
Please go home. Im sure your parents are heart broken worring about you every day.