That is awesome!!!
I agree with Zorbs, you need to track your nutrition to see how much you are eating and what you are eating (protein, carbs etc.)
When I started running, the scale didn't move much but there was a HUGE difference in how toned my body became etc. because I gained lean muscle mass in my legs. Don't let the scale control everything!
To amp up your calorie burn, try some interval training you burn way more calories this way. Also, and I know you are busy, but strength training shreds fat too. Strength training is CRUCIAL to any weight loss program. You won't get big or bulky, just ripped and toned and sexy.
Check out my photo gallery, I have been doing P90X and have only lost 8 lbs since I started doing it, but it looks like i lost 20 lbs because it is all lean.
Hope this helps!