I remember my EEII teacher once saying that when you aren't able to credit someone's work because you don't know the name of the writer/singer etc, you can name the title of the piece and say it's by an unknown artist. In your case it would be 'Renovators dream' by an Unknown artist.
You need to post your rankings and marks for each subject if you want a decent answer. Be patient and wait until all your results are back.
Wrong forum too.
The more you worry about this, the harder it will be for you to 'fit in'. Remember that at the start of uni, almost everyone feels a little anxious. Talk to people, be friendly and approachable. That's all you need.