Muffled squealing/wheezing from rat?

This has been going on for about a week in a minute. It has gradually been getting worse and worse, and I don't know what have caused it or how to fix it. Should I take her to a vet? Here's the video (since I don't really know how to describe the sound):

http://s208.photobucket.com/albums/bb233...

Could anybody please give me some suggestion? It would be greatly appreciated.
Thanks!
:)
She sounds pretty bad. Yes, get her to the vet, the longer you leave these things surrounded by small animals, the worse it gets.
GUINEA PIG HELP ME PLEASE?????
It sounds approaching your rat has a respiratory infection or obstruction. I would bring it to a vet. If the infection or obstruction get worse, your rat could die.
Guinea helllllp?
Answers:    All rats are born with upper and lower respiratory problems, your rat is in intense discomfort, you will need to her to a vet to bring antibiotics and a shot, also pinch her fur on the back and if it goes rear legs slowly she is dehydrated, make sure you bring some hydrating water from the vet. Good luck :] I hope your little darling gets better.
What is your view of the BEST hamster enclose and your reason?   My pet rat still hate me?   I dont dream up my rats own really bonded next to me?   New rat problems ?