Why am I Not Shredded Yet??

6 days ago, I started doing the Jillian Michaels 30 Day Shred workout DVD.
I must say, it is quite challenging, despite the fact that the workout is only 20 minutes long. You do short intervals of cardio, abs, and strength exercises focusing on getting the most benefit for the shortest amount of time. The idea is that you do this workout daily, for 30 days to see maximum results.
Ideally, you want to move up from level one through to levels two and three as you progress.
I am still on level one. I haven't found this workout to be quite the killer that I was expecting it to be, but it is still no picnic.
So far, I haven't really seen any physical changes in my body, but we'll see how things look when I am at least 15 days in to it.

In other news, as of Dec.25th, I have only lost 5 lbs and an inch and a half. Not the stellar losses I have been expecting. I have to admit that it's a little discouraging being stuck at the same scale weight for 4 weeks now, even though I know that plateaus are common, especially as you begin to work out and build muscle.
I still haven't decided if it would be wiser to eat more or less right now in order to blast through this plateau.
In the past, I have tended to give up right as I hit a plateau. This time, I will perservere, tweaking my diet and fitness routines until I see positive results.
I also have to go get my blood drawn soon to see if I have any medical problems that may be contributing to my slow weight loss.
I hate having blood drawn.