I agree with all the responses made to your query, just a small add-on, since I went through it;
Once you file in your Urgent processing there is no way to find out if they have agreed with your request or not. Especially if you request it mid-way. So the best way to make sure is to give it a week and follow up with your local MP. They will get back to you in couple of days and confirm that your request has been received and that there is a note on your file. Again they wouldn't let you know of the outcome but at least you know they have read through your request. Regardless of the outcome, on the day of your test follow up with your officer/interviewer, she/he is the very officer responsible for your application. She/he will allocate the earliest Oath date for you, usually falls around two/three weeks after the test.
I requested an urgent processing after three months from my IP, and I had solid excuses, my passport was running out and I had to travel for work. And I think you have a good excuse too. So I really think they will expedite the processing for you. Just remember even if they agree with the urgent process you're looking into at least another 4 to 6 weeks before you take your Oath and another two weeks for your Canadian passport unless you have your ticket in your hands and you're days away from your flight.
Best of luck mate,