Before I get started, yes I plan to ask my psychiatrist about this, so you don't have to tell me to , though thank you.

I've been through very traumatic experiences consistently throughout my life, and I still have ptsd.
Having been through an unnecessary amount of hell in my life and being so worn out from that, increases my chances of my brain going a little off the rails.
That's just point one 
My father will not get himself help, but it is INCREDIBLY likely he is schizophrenic. I'm not diagnosing him but he's almost a cliche.
My mother had bad mental problems.
+I've smoked weed on and off since I was 16, but have since tried to stop finding out it may be ruining my brian, but it actually helps UC, my digestive issue, so I'm in a pickle, but I digress.
This is for context to understand I am at risk for schizophrenia.

I just turned 18 a few days ago, but I've already had some bad breaches with my reality.
I've had some terrible anxiety on and off for a very long time, and I'm sure you may know that causes depersonalization and derealization, a lot of people may think that's a sign they're not well off.
I'm used to these feelings, sometimes I think things are worse than they are, but I know they are just bad aftershocks from panic attacks and whatnot.
The point of that ^ is I'm able to recognize what are regular anxiety symptoms decently.
Also, I don't know if it's worth mentioning I'm confirmed/diagnosed autistic.

So, the thing I really need some clearance on is something that started happening to me a few months ago.
I'll be minding my own business when something I'm doing, or something I said, someone else said, something I saw, touched, tasted, ANYTHING sends me somewhere
I feel no longer part of where I am, I feel the whole universe (not in a peaceful oneness way), I feel nauseated and feverish as an unfamiliar train of thought pulls into my station.

I'm bombarded *key word* bombarded with a string of thoughts that I insist are not my own, they feel so unfamiliar and foreign to me
there's words attached, spoken by other people (i do not audibly hear) , phrases, just general uncomfortable and strange alien thoughts. 
Like someone else's trash blowing into my lawn, I don't know where they came from, they don't belong to me.

I have been aware of how that sounds since the start, I've tried to look it up, I've been told I'm gifted in a supernatural sense, so maybe I really am accidentally picking up someone else's thought broadcast.
Nothing is impossible, right?

I've tried to just be okay in these moments, let them pass through,
but when I try to just let them leave on their own, they DON'T ,  they make me feel like im gonna be sick unless I snuff them and force them away.
They are not as common when I am not in a stressful time.

I can't figure out what else to say about it, it's all very bizarre
If you have any questions or are curious about the contents of the mystery alien thoughts, please ask, I'll gladly elaborate, 
hard to write them down sometimes, but I caught a few .