Freaking German: ICH SPRECHE GUT DEUTSCH NICHT!

Today is going to be my German exam, and then I only have one more which is Business Communication, and then it will be the end of Fall Semester and break!
However, that German exam totally makes me feel freaked out. It's been like 1,5 years since I've started studying it, and I hardly made any progress. I can only say simple things.
I remember this past summer, when I was flying through Zurich, where they basically speak Deutsch:), I was trying to start a conversation in German and it was hardly any success.
I especially feel odd, because I was born in Germany (in a small town by the name Pirna), so it's almost like I HAVE TO KNOW THIS LANGUAGE, and I even remember that when I was 5, I knew quite a bunch of German, but now it's all gone.
I guess the reason is that I hardly have any motivation and that is what, in my opinion, is the most important in the whole process of studying a foreign language.
I don't have any friends-native German speakers and I don't really need German in my everyday life. I wish there was someone who could talk to me in German on a regular basis, and then it would be moving somewhere.
How will I make it today?!