Try not to be worried, easier said than done I know. When my GP referrered me to the Breast Clinic he said that goverment guidelines say that all women who have been referred should be seen within 2 weeks, I am lucky that in our area our hospital stick to the guidelines and all women are seen in that time scale as a matter of course. Now you won't have so long to wait and worry which is the worst bit.
I hope all goes well for you.
Best of luck