Thank you all for your replies.
I'd like to get this fixed as cheaply as possible as you can imagine. Would it be cheaper to go to a local mechanic or to a specific exhaust place such as the guy recommended above? There is a Fast Fit place near to me in work which would be a lot handier for me to get to than Kimmage. There's also a local guy working out of a small garage down a lane beside my house. However if this Kimmage guy is great and reasonably priced i would go to him.
Was thinking maybe i'm blowing it out of proportion. Does anyone know if the exhaust on a 00 car is supposed to be a bit loose and wobbly at the back? It feels like it may be missing a bracket or something but it's not hanging down or anything. The noise isn't excessive, just noisier than it used to be, like i said, kind of a loud humming noise. It's my first car so really dont have any idea and nobody to ask.
Thanks all.
Miss Sherry