Recovery

I think this is probably a really simple problem to rectify for someone who knows. I was messing around the slidebar last night too, and i think i may have changed the name of my account, basically all the information and i want is now in a new folder, and when i now log in to my mac, it seems to treat me as a new user, even though i have made no new accounts. Does anyone know anything that could have somehow caused my mac to now behave as if i am a new user, i have lost all my settings and templates, and it is driving me mad.

i now realise using a google search rather than the search on here, this matter has been covered many times. I do believe i may well have changed my user name, and now attempting to follow steps given have now managed to revert my settings again, so todays progress has now been reset.
Basically i am not sure what the original name was for my account on the slide bar, and i am now so confused i just want to reset it back to how it was, and i know this is a very simple thing for someone who knows, if anyone can give an explanation for dummies, i would be most grateful. I have had this machine for over 3 years, god knows why i decided to change a name last night, and why oh why is it so simple to do, and then causes a day of misery?

There's plenty of that same discussion in here. Think you didn't use the correct search query.

Here's two of them:

http://www.mac-forums.com/forums/showthread.php?t=95853&highlight=change+home+account

http://www.mac-forums.com/forums/showthread.php?t=87144&highlight=lost+settings