My ipod touch 4th generation wont charge from any point of power. What can I do?

its a 32 g. its the latest update avai;able for this ipod, there hasnt been a new one in a while. I dont know why this problem could have started i think i mightent have charged my ipod in about 2 or 3 days cause i wasnt using it too much then i tried to charge it yesterday and it wont take any power. I've tried charging it from the wall the car the computer but to no avail.