Well, that definitely changes my answers.
I would look carefully at what you're eating. I know when I started I could be a little sloppy with measurements. Even though I think I can eyeball portions, I can't really. I wouldn't panic over a couple of weeks, but just make sure that you know what you're eating and that your numbers are correct (assuming you're a calorie counter). I might still look at if you're eating enough to support the activity level you have. I say that because at my weight (and we're close) I burn about 3000 calories a day.
If I said to most people that I was eating 2000 calories a day minimum they might at first think that was too high. For me, it isn't. I only recently dropped it down from a minimum of 2150. I do go higher on days I lift weights and do cardio.
When I started strength training back in March I was using a book to guide me. They had a very good quiz that they suggested you do 4 weeks in. I continued that practice for a couple of months. I grabbed the questions from my blog:
Did you gain weight, lose weight, or stay the same?
Do your clothes feel loose, or are they tighter?
Do you see any differences when you look in the mirror?
How do you feel? Energized or tired?
How are your workouts going? ...
How are you sleeping at night? ...
Has your menstrual cycle changed?
The concept was to look at overall health and possibly adjust calories. The last one is probably one to look at carefully. The one thing I've noticed this time losing weight (as compared to others) is that I've become almost 100% regular (something I never was). If your cycle is suddenly longer apart, lighter or missing completely you probably aren't eating enough. Kind of the same thing with energy levels. If you work out really hard, and don't have energy for other things that could lower your overall calorie burn (this is something I've been very guilty of in the past). I would do tons of cardio in the morning and then do as little as possible the rest of the day. Using myself as an example (from a while back):
Watching TV/Computer - 125 cals/hr
Light Gardening - 180 cals/hr
Heavy work in garden - 275 cals/hr
Light Cardio - 400 cals/hr
So let's say I get up and do an hour's worth of cardio in the morning. Then I spend the next 11 hours doing as little movement as possible.
400 + 11x125 = 1775
Or, maybe I skip the cardio but spend the day working in the garden.
2x275 + 4x180 + 6x125 = 2020
So I could potentially burn more calories without regular exercise. Now, I'm not suggesting that you don't exercise, but it's more of a comment how overall activity can be more important.
I've rambled a lot here, and I'm not sure if any of it is useful. Just throwing out some thoughts.