My ipod is working but I can't see anything. It's a white screen with some white bars on the side but I know it still works. What can I do?

I was getting a tour of VIU (university) I noticed that the roof was low so I tryed to touch it. I thought I left my ipod on the bus. First jump I make it falls face flat on the floor. No cracks, so I thought it was fine. Before getting on the bus I turned it on and saw that it was messed up beyond belief. A complete white screen, except for a couple of virtical grey lines. Later on in the hostel we stayed at my friend turned it on and tryed to reset it. Nothing worked. However, she did something (I don't know what) and she got the voice respond thing on. It plays sound but turns off after 10 seconds of not being used and you can't see anything. I was stupid to do what I did and hope that something could be done. What happened exactly and what do I do?