Depressed

My therapist told me I have a SEVERE adjustment disorder. I don’t really understand what it means however. All the time, I feel like I don’t want to exist and should have never been put on this planet. I ask my parents all the time why they had me, I am not supposed to be here. I’m not sure where the adjustment order falls into place with all of this, if there is anyone out there that I can talk to more about this type of stuff, that would be awesome. Thanks for reading.