I'm not in a mental hospital.

I had a car crash in May and developed many symptoms such as cognitive and intellectual deficits, memory problems, headaches, strange feeling inside the head like "pressure", sensibility to noises etc...
I recovered from them in August, albeit I had a couple of small intensity relapses lasting a few days each.

Then in December someone (I don't know who) made me vist by a psichiatrist because I was unwilling to left home until I was sure that it will not give me another relapse, so I was forced to take antipsychotis meds because I was "delusional" since according to them you cannot have cognitive problems without losing conoiuosness, so I must be crazy for believing it.

I'm not taking them since early january but their effects didn't stop and I'm afraid it will be permanent.
Said effects are huge congitive problems (worse than the concussion ones, i'm basically unable to speak and communicate verbally with people) and the inability to feel pleasure at all, not even with sexual activities.

I have all of those problems and was also in car accident. The head pressure is torture. I’d say try to find neuro ophthalmologist to rule out vision issues and get hormones tested.

Can someone please give me some advice about how to prove to my psychiatris that is possible to suffer a concussion without losing consciousness?

I don't know if many Drs would read an article or website, but your best chance tot convince a Dr is to find the info on a "professional" medical site.
oh..here ya go--
25 Search Engines Every Medical Professional Should Bookmark | NursingDegree.net

[However, many patients do not lose consciousness but instead manifest symptoms and signs such as] more-
Sports-Related Concussion - Injuries; Poisoning - Merck Manuals Professional Edition

Danielson,

Maybe you just need to find a different psychiatrist. Few doctors of any flavor can be convinced to believe something different.

An ignorant or incompetent doctor will always be ignorant.

What do they call a medical school student who graduates at the bottom of his class? Doctor.

Thanks a lot, I will give it a try.

The fact is that I'm forced to see this psyichtriast, he is the one that forced me to tke antipsychotics.

I had the DTI MRI, it comes back clean.
I'm very sad because now the doctors will use it as an evidence to say that my problem is psychological.

A clean DTI MRI does not rule out an injury. A positive DTI MRI is very accurate but false negatives are not uncommon. A healed injury can still cause symptoms without showing the DTI abnormalities.

Maybe the language issue is a problem but the way you explain your symptoms leaves issues to consider. You come across as far more anxious than objectively aware. It is very difficult to self-diagnose most of the symptoms you have stated other than headaches. Reading about concussions can trigger an over concern for such symptoms such that every time one forgets, they attribute it to the concussion.

A professionally administered Neuro Psychological Assessment is considered the gold standard for diagnosing neurological deficits.

Yeah language is surely a problem, hovewer I don't think that my current symptoms are due to the concussion but due to the antipsychotics.
Mi cognitive struggles are surely there and real, I can't understand simple concepts and I slur my speech unable to formulate coerenth sentences.
The psychiatris has prescribed me a neuro psychological assesment.

Trust me, get your hormones tested. I had to do 5 hour STIM test. My MRI with DTI was fine but I just found out I have hypopituarism from the STIM test. My Testosterone levels are fine so even a basic hormonal panel would have missed that I’m deficient in growth hormone.

There are maybe a few endocrinologist in the U.S. that are aware of the hormone/TBI relationship. I’d do whatever you can to find one.