Im a 13 year old girl. Yesterday I noticed I looked alot skinnier so I decided to weigh myself & I found that I had lost almost 10lbs. I have no idea how I lost the weight. Nothing in my diet has changed at all, I have been eating the same for as long as I can remember. I told my mom and she said it could have something to do my hormones. I got my period two days ago so im not sure if that is why I lost all the weight.

Help! I really want to know why a 13 year old girl would suddenly drop 10lbs.