i agree with the tape measure. Start using one, that way you can track it easier. clothes stretch or shrink depending on how they're treated, but the measuring tape stays the same.
I'm the same way, as far as hips and thighs. I lose really fast in my waist and stomach, but verrrrrry slowly in my hips and thighs. also my bottom half is a size bigger than my top half. I will say, however, that running did a whole lot for my legs. yes, you can't truly spot reduce, but certain exercises can emphasize loss in certain areas. also I am not a marathon runner, by any means, for a while I worked up to jogging (4mph) one mile 3-4 times a week, and that's what helped me lose 6 inches on my thighs in a month.