How to lose weight?

Hello, please help me. I'm 17 years old, almost 5' 7'' and I weight 135 pounds. I've been dieting a lot. When I was 14, I found out I was 165 pounds and I went to a nutritionist, I started eating healthy and exercising, I lost almost 30 pounds. Since...

then I cant loose weight anymore.I eat healthy food, I don't drink pepsi or eat chocolates, if I want to eat any kind of sweets or junk food, I do it on the weekends or once a month. But still I cant manage to loose more weight, sometimes I stop eating any carbohydrates for 3 or 4 days to loose weight but it doesn't work, so ill eat a lot the next day. Can anyone please suggest any ideas on how can I loose more weight?? I'm really desperate ...

exercise btw 135 at age 17 is under wate im 17 and I way 180
if you cant lose eny more its probely cause theres nothing to lose

 
You have a BMI of 21.14.

BMI is between 18.5 and 24.9 (Normal Weight)

People whose BMI is within 18.5 to 24.9 possess the ideal amount of body weight, associated with living longest, the lowest incidence of serious ilness, as well as being perceived as more physically attractive people than persons with BMI in higher or lower ranges. However, it may be a good idea to check your Waist Circumference and keep it within the recommended limits

I don't have a weight chart for a teenager of your height so I've listed the link for the Normal Adult Height-Weight Range Table.

Normal Adult Height-Weight Range Table

http://www.recipehound.com/weight.html

Eating healthy aint going to make you lose wait. you see, if you alreddy eat healthy and expect to lose more wait by doing the same thing, you're never going to get anywhere. thats like ,okay this is going to sound strange but its true, slapping the same area of your arm for an hour and at the last couple of minutes wondering why it doesnt hurt when you slap anymore. its because your body has alreddy gotten used to it and needs some change. so exercise, everyday.