Many of these mental illnesses tend to overlap and you can go to 5 different psychiatrists and they can give you 5 different diagnosis to your problem... Diagnosis also has a lot to do with what you tell them.
Heck... You can even be completely sane yet act it out like an actor... You can visit a psychiatrist and act like you think you're Jesus... Then you'd be called delusional schizophrenic or something like that...
I visited 2 different doctors... One said I am a paranoid schizophrenic... Another said I'm just a depressed person... with slight PTSD...
Anyway, the truth is, I've experienced a lot of abuse in this life. From:
-parents (stuff done to me coulda got child services on them... Both mom and dad physically and verbally abusive. Covered up for them back in the day out of fear I'd be kicked out and get homeless or be transferred to a foster home where sexual abuse is rampant)
-Bullies (had to resort to a lot of physical fights to get em off my back. But it went from physical assault to just talking shit and avoiding me cuz I got seen as a dangerous insane asshole later on)
-Compulsory military service in the Philippines... (Harsh and brutal... A lot of things they do to 15-17 year olds would get an officer in the US army court martialed or demoted... We had to be harsh cuz of threats of Islamic extremists and communists... And China likes to threaten us... We don't have all the high tech toys of the US army so every individual soldier needs to be toughened up...)
A lot of people would either have committed suicide or end up as a bum on drugs or in jail or the mental institution for those things...
In real life, I'm generally socially withdrawn and extremely quiet especially in group settings. I also tend to come off as callous and numb. And overall body language is "don't fuck with me". Most social interactions and conversations make me feel awkward and I don't know what to say or do or how to react except stare blankly.
I'm way more open when talking online than irl.
So God knows what other mental disorders I might have... Lol