I has an iPhone 4. But it won't do anything, why?

I do have iTunes on my computer but I had to get a new charger because my last one stopped working. Ever since then I haven't been able to use my iPhone on iTunes through via computer. No music and it says my last use for iTunes on computer was on the 9th of last month, which isn't true, I just tried a few seconds ago. What could be wrong? Sorry this is so long but I need help fast x.x

Just get a Samsung Galaxy S4 and you'll be fine.