I have been doing the Firm videos for quite some time now, and I am very happy with them. I lost approx. 14 lbs. so far, and I can tell that my clothes fit a lot better. However, I have been reading this board for a while, and I am wondering if I am overtraining. I have been doing the videos every day - I am trying to do the cardio ones every other day, and the weight ones the other days. I exercise at least 1 hour every day.
Now... every few weeks or so I have to take a business trip for about 5 days, and during that time I am not working out (except for maybe 30 minutes every other day for abs - since I don't have the equipment with me). I also escape my diet during that time, and I indulge myself with either prime rib or mashed potatoes once or twice when I'm away. I was afraid at first that, when I came back, my weight would be up again, but it turns out that it stays the same, if it's not lower.
So... should I take a break when I am home, or is 1 hour a day OK? I am afraid I have hit a platteau, and I want to start losing weight again (I have been stuck at my current weight for approx. 2 weeks now). The thing is that I feel very guilty when I am not exercising, that is why I am trying to push away the "rest" day, and it seems that no day is a good day to just skip the exercise.
FYI, my diet consists of a light lunch (a chicken salad) and a light dinner (usually some chicken with some veggies). I eat apples all day (4-5 giant ones), and during the evening I have a small cookie or something similar for desert. I drink a lot of water, and maybe 2 cups of coffee in the morning.
Please give me your opinion on what I should do to start losing weight again. I want to lose another 15lbs or so... I am a 37 year old female, 5'3", 138 lbs. I don't look very big, but I want to squeeze into my skinny jeans again.

Thanks in advance.