My story so far

Hi, i am a 22 year old and i think have been depressed for like 5 years. I have seen several doctors and currently seeing some. Hearing other people it feels like there is underlying bad event that pushes you into depression. But in my case i don't think so. I have adequate support from my parents and friends. If someone asks me why i feel depressed i am not able to pinpoint any reason. Be it with reason or without reason in shortest way i can explain is my brain on mind doesn't seem to function normally. And nothing seems promoting as to how will it get better. Open to suggestions.