Less than 6 weeks!

EEK! Less than 6 weeks until the Richmond half marathon, and most times I feel nowhere near prepared. So how's training going?
Well, I had another day last week where I just felt awful. I still don't know why. So that threw a wrench in my training habits. I adjusted the training schedule and I'm working away, though!
Today I walked 50 minutes with an average speed of 3.6 for a total of 3.07 miles. At one point I was speed walking at 4.2 mph, which led to my fastest mile of 15:11- my fastest yet! I felt great afterwards, too.
My only problem now is adjusting for the length of the half marathon. I can do 50 minutes no problem. But can I do several hours? This is what concerns me the most. :/
Let's see... what else is there? My weight is very, very slowly going down. I can't notice any real changes, although my thighs feel stronger. They're still flabby, but it's easier to feel the muscle under all that flab.
Besides that not much has changed. I need to purchase some real running clothes because what I'm wearing now ain't gonna cut it.
ta ta for now!