I think I'm mental unstable

Oki so for a week and a half almost every month or every other month I get extremely high symptoms of depression, ADHD, bipolar, and I get suicidal. But then after that week and a half I feel normal again and it happens over and over again. I am not diagnosis professional and I'm not trying to be one if thoese fake depressed teens (they piss me off so much and 🙄) I told my parents and they said it teen hormones cause I'm 13 and idk are they right? And if they aren't what is this?