text: Read the book "Body for Life" by Bill Phillips.  If you already work out, this book is for you.  My wife and I read the book and did the workout routine and eating routine.  She was already small like you and could not lose any more pounds until she did like the book said.  It is a very good book because I personally do not like reading but I read this whole book.  You can purchase the book pretty cheap on Ebay or it is about 25 dollars at your local book store.  The key is the eating part so you really need to look into it.  I know you say that you eat healthy but according to the book (which works) you have to eat 6 times a day.  The book recommends that you use supplemental shakes for meals and they obviously recommend their shakes.  But, you can use any type of health supplement shake.  During the six meals a day, I would usually supplement at least 3 of them with shakes (my wife used Slim Fast shakes as her supplement meals).  Check it out, it is great if you really want to get to your ideal weight.