Existential Crisis

Do any of you guys go through this too?
I heard that mostly people who are around 20 get this, but I started getting it earlier, at around 17 and till today I still go through existential crisis.
Women have period each month for a week, well I go through existential crisis.
To be honest I think that it's both a good and a bad thing.

It's bad because of this shit, I lost interest in nearly everything, especially school.
I just feel empty nearly everyday in my life, and it sucks. Even when I try to really put my head into something, I just cannot seem to do it and I get depressed ._.
You realise how fickle and (most of the time)boring life is.

On the good side, going through existential crisis makes you realise a few things and you become self-conscious about life.
I realised how it's easy to lose everything...your family, your friends, anyone close to you could be gone in an instant, and this undeniable fact can help you appreciate more people around you.
It also makes you think about your future, about what you really want in life...what makes you wake up everyday. It makes you think about what your goal really is.
It made me realise mine... I don't want to live a monotonous, boring life(which most people call a "normal life")
Living in a house, going to work in the morning, getting back at around 5-6pm, too tired to do anything really interesting and then go to bed...rinse and repeat.
No, this is not for me, it's absolutely dreadful.
What makes me go is...music. I want to form a band and make music... I realised that's what I want to do with my life.
I actually already performed in front of many people, and I LOVE this sensation, this satisfaction, this fulfillment I get. I NEED this in my life, I don't want to regret anything.
I want my life to be so that when I'm on my deathbed, I can say that I lived a happy and satisfactory life.