I am having horrible moodswings. Help?

I am fifteen years old and it may be stress or something more but i need other opinions. It started last year and is gradually getting worse. Last year i would just get mad like any other teenager would but this year one minute i will be happy and the next i will be raging like a mad woman and sometimes i feel like my mom and she is going through menopause. The other day i was trying to fix my window and its weird because when you close it you have to push the top up and pull the bottom down. I am not that tall so it was hard to reach and it was very dark outside. I couldn't see in front of me which makes me anxious and i was trying to close it but it would close so i was getting very angry and the next minute i was across my room crying. yesterday i yelled at my brothers for something stupid and i don't want to push my family away so i really need help. Also i don't want any stupid remarks either. Keep in mind i am moody and those wouldn't help at all so only helpful remarks please.