Hi, friend. I've got some things to say, sorry if this turns into a pretty long reply.

I'll start by saying I'm a 22 year old girl with hormonal issues along with mental illness. As I was reading your post, all I could do was shake my head yes and think about how similar our situations are. They aren't identical, but similar. (I haven't dealt with any eating disorders before.) From a really young age, probably 12, I've had problems with hormonal type issues. I had super heavy periods, cramps that made me lose consciousness in the bathroom floor (it happened at school a few times, that was fun) or send me to the emergency room, horrible mood fluctuations that were directly related to hormone fluctuations, etc. Around age 13, I started experiencing depression and things I knew weren't normal. I became convinced that no one else was real, or that my whole life was a dream, or that nothing mattered and life had no real consequences. I felt like I was in a fog or a dream. I would go from being pretty okay to being a raging, sobbing, screaming mess in no time. I had a horrible time trying to focus on anything, especially school. I knew I wasn't just depressed. The depression and periods got worse as time went on, and it wasn't until I had a pretty bad breakdown and serious thoughts of suicide when I was 19 that I finally started reaching out for help. That's when I got my diagnoses, and started medication treatment. It literally saved my life.

If there's anything I've learned or taken from that experience, it's that it's never too early to go get checked out. I (and every person here) won't be able to tell you if you do or don't have bipolar disorder or any other illness, and I highly discourage using the internet as a tool to self diagnose. However, I know that it does help to be able to look online and try to get an idea of what might be happening to you. I would suggest seeing a mental health professional as soon as possible. If I might ask, what state do you live in? I'm interested in what the laws are in your state about mental health professionals and minors in regards to parental consent. I definitely want to help you figure this out. I know how it feels to be a 16 year old girl, looking at all your peers and just wondering how it's so easy for them to deal with it all. I know it's hard, I know it's a struggle, and I wish I had known at age 16 that things can change. Just remember, things can always change. Be well, let me know what state you're in if you're comfortable with it, and we'll try to figure something out.