I quit smoking! When will I cough up flem?

Hi...This is a question for all you reformed smokers out there. I just quit smoking..this will be my second day. :) woo hoo... but I was wondering when I start to cough up flem..This might sound crazy (tee hee)but I can't wait to cough it up. Ive smoked for about 10 years..but only heavy the past 3 years. Thanks