awww lol... you sounded great! I tried to use Shazam on my phone and it gave me an error. hehehe
Sounds like you are saying Banna fish... :-p
There are many easy programs that you can hunt and peck on for the notes and make a rought draft of the tune. If you have had it in your head that long try thinking about the next note and finding it on the keys, then put it all together.
The PC will show you what note it is, you do not have to know how to write music per say. Might help... might even start something you find you really enjoy.