Ok, thank you very much!

So, i just got my Wii U this morning and had to set up all this Nintendo network stuff. I have a 3ds and have used the eshop with it before, but for the life of me I cannot remember if the 3DS made me make a Nintendo Network account, or if i just used the Club Nintendo Information. I made a new Network account since I assumed it was something new and My wallet for the Wii U eshop is empty, yet my 3DS wallet still has about 2 dollars left. Does this mean I accidently made an extra account for no reason? If so, how do i find my original account info on the 3ds? I looked under settings but didn't see anything that seemed to talk about at least my username