Do I have a mental disorder?

I need help and i dont know what to do and that s Why i Signed up (english is not my first language So im sorry if there are some misspellings or something else)

It all started some months ago (about 7) when i began feeling more disstress than usual. In my Head i always knew that i had the symtoms of an anxiety disorter but i Did not really thought about it. I just lived with it thinking it was normal. Until i had an episode which i belive it was an anxietty or pannic attack. I dont know what it was and i dont remember much other than not being able to breathe, shacking and beliving that i Would die. I Told my mom about it and about How i was feeling overall. I went to a psychologist a few Times and then i stopped because i thought that i was Making a big deal and no one cared.
Another important thing that i think is going to relate in some way about what im going to talk about NexT is the fact that i have trouble sleeping. Not because of nightmares or insomnia, my sleep schedule is messed up and it has been that way since i remember. I go to bed tired, i go to school tired, i Take a nap thinking it will help, i wake up tired, i make my homework while being sleepy, i go to bed and the cicle continues. Because of this my mom belives that those symthoms Associated with anxiety might have Developed because i have chronic fatigue(i belive). I MUST (re)ADD that i have not been diagnosed these are some belives. I dont Want to make further research until other people give me some advice.
All and all these things bring to the dissociative thing
Lately i feel like im not living. Like im on autopilot. I dont feel like im in the prezent like my body is moving without me, Like im being possesed and im just being here but im not i dont know How to explain. I am not doing well. Nothing brings me joy like it used to. I try going to the gym(maybe it will help) and i started painting my Wall. I dont know what is going on and im scared. I hope this is not reality and it will go Away. I started feeling like im not myself, i dont know who i used to be .I feel like im not here i just dont know. I need advice from someone. I will Take anything.
Thank you for your Attention!
Have a happy day.