I got a ticket for having drinks on me, I'm 15 years old. I had court in September and another One in November. I didn't go. Because I forgot. And I still hasn't went to court. What going to happen?

Depends on the law where you live, but its likely a warrant will be issued for your arrest or your parents arrest.

Yes, where you charged as a adult or as a juv, ( was it juv court or not?) but yes, there will be a warrant for your arrest issued, and in some areas your parents who are to have you to court, may be arrested for failure to have you appear.