Nintedo Ds Problems? Please help!?

Okay So I have a Silver Nintendo Ds Lite, I've had it since last Januarary. One day I decide to play it, So I take my game and try to put it in the slot where your game goes. It wouldn't go in, I didn't know why Until later on I found out a penny was stuck at the bottom. I got it out evantually, But then I had to charge my ds since it was dead. I plugged the charger into my Ds, it didn't work. I tryed my friends Ds and It did work? And whenever I'd plug my ds with the charger, the Orange light would flicker once then turn on. and Now when I plug in my ds It won't even turn on at all? Whats wrong with it?