What is wrong with me? do i need professional help?

I don´t know why but it´s like my life is a roller coster . I have periods where I´m really happy. Truly happy with myself, my friends and family, school... yeah just happy with my life. And then there´s these periods where I´m almost depressed. I`ll...

just waste my day in front of the tv - and then when I go to bed and regret that I didn´t get more out of my day. I´m always super stressed and sometimes I just cry because everything sucks so much and I just can´t do everything everyone´s expecting of me.

I know life does have it´s ups and downs, but isn´t this a bit too much? I really don´t know.. Do I have problems? Like serious issues where therapists come in to the picture? And please don´t start judging me, just be kind and answer

And if it is to any help here are some sort of quick facts of me and the people around me:
- I´m a perfectionist (as in whenever I do something and it´s not totally the way I want it to be, there´s this voice screaming inside me that I have to fix it)
- I have an older brother who has for 5 years caused my family a lot of struggle
- My mother recently went through chemotherapy after being diagnosed with breast cancer
- My father has high blood pressure
- I´m the youngest child
- I don´t have a lot of friends, but I have the best best-friend

And if I have to say anything else then ask and I will try to answer

Nora

although my life sounds happy; being engaged, forming a band, etc., it really isn't most of the time. it's been this way going on five years, which was when I got thrown out of my parents' house. that started my sadness, then I started getting low self-esteem because of who I am (too personal to mention here). this then led to me seeing a distorted image of myself in the mirror, wishing for death, and other stuff. all because I am always left with the feeling of being alone and misunderstood. there's more, but I don't want this to be too long. I will say this though: I know how you're feeling and if it'll help, I'll be more than happy to listen; for I understand. and also, I'm very confidential, so no one will have to know any of it.