Hi. So I'm a 17-year-old girl who just recently lost about 50 pounds. I now weigh 132 pounds and I am 5ƌ. I haven't had my period in a couple months, which I know is due to weight loss and increased exercise (I'm a virgin, so I know I can't be pregnant). Why did I lose my period, and how can I get it back? I don't think it's because I'm underweight ... right?

congratulations on your weight loss success.
This has happened to a few of my friends when they lost a lot of weight. You should go to the doctor to check it out just to make sure everything is OK. But most likely you just have to give your body some time to adjust and it should be back with in a few months.

Probably due to exercise and extreme weight loss. I had been dieting and exercising and have lost my period too, but that could also be because I was eating a low carb diet. Was your diet low in carbs? Because carbs are the main source of energy and without it your body thinks you cant handle a foetus therefore it doesn't decide to release an egg. Try eating complex carbs such as fruits. They will be healthy and low cal so you shouldn't gain weight.