Your title says it all--your
body's being stubborn, but your mind is still moving straight ahead on your planned course. Sooner or later, your body's going to have to comply with where your mind and will are taking it.
Just keep on keepin' on with your caloric intake; the weight WILL drop. Some people just lose in different patterns. I know at least one person posting here counts her weight loss on a per-month basis because she goes through a couple of weeks of no loss, one week of moderate loss, and one week of "OMG, look at that!" loss. I lose in fits and starts too. You might be one of us.
If you've been working out heavily (especially if you've been lifting weights), you'll notice an uptick on the scale. Muscles repair themselves after strenuous exercise, and in order to do so, they need fluid; your body holds onto a little more water after vigorous exercise, so rather than look at it as a bad thing, try to see that little upward fluctuation as a sign of a thorough workout.