HELP! could this be a sign of a first period?

I'm 14 and still havent gotten my first period. Lately, I've been having moodswings, fatigue, headache, and discharge. And randomly today, I got extremely thirsty and water only quenched my thirst a little bit. I know im not dehydrated becase i haven't done anything physical today. So Is thirst a sign of a first period? Or is something wrong with me?