Your weightloss amount is fine
...But I do agree with the others and think you need to up your calories. For your height and weight, you should be eating more...
I recently spent a week eating 500 calories more a day after I stalled for over a month. During this week I've managed to get down about two pounds by eating more. Sounds crazy, but our bodies are crazy...Up your calories, continue what your doing, and see what happens in a few weeks