Thanks so much for replying!
knitgal, I'm not sure what type of yarn it is, I bought it years ago and the labels are long gone. And I think you're right that blocking sounds as if it would be more hassle than it's worth.
OffJumpsJack, those alterations you suggested are quite clever but I'm a little embarassed to admit that I'm quite a way into the scarf (thought it would magcally stretch!) so I won't be able to use them. I might have to do the 'frogging' (never heard that term before, it made me laugh out loud), so thankyou for pointing me in the direction of the life line - sounds handy.
I guess I better hunt down a pattern and do it properly this time.
They say you learn something new every day, well I sure learnt my lesson today!
Thanks a lot for your help