Q: reinstalling itunes

I recently signed into Itunes and signed up for the 3 month trial.   My system crashed, had to reinstall everything, now I can't find my account, even though I tried signing in with what I knew.   Also, I want to make sure that my 3 months are still in effect.

I am trying to install on windows 8.1 to transfer to my ipod.    I did have an apple phone, (old), but it stopped working.   I am trying to resign into itunes, but it won't bring me to my account.

thanks, debbi