Really desperate to lose weight before school start

Slowly, and I know you've probably heard this several times, but Eat healthy! Do NOT stop eating completely, I went on a intense diet where I stopped eating for a week completely. My hair started thinning, I was cranky and Tired everyday, And Once I started to eat again the weight came back fast, worse, and made it so much harder to burn. Go to the Gym, That helps a tun! I also Recommend Zumba, it's a fun and stress-free way of exercising. 40 pounds is a lot! But if you're dedicated, I'm sure you can do it! Best of luck.

Sorry to crush your dreams but most schools are 2 weeks away. Starting weight loss now won't help your appearance much.

IF you want a better appearance muscle is the way to go on such a short time span.

Yes in 2 weeks, by starvation ( which is not good) you may lose 10 lbs. Weight did not come on fast and can not be loss fast.

If you wanted to lose 40 lbs you needed to have started before school was out for the summer.
Start now and by Christmas you can do it.
Watch your diet, and eat a proper diet, and increase activity