What the hell is wrong with me speaking and writing problems?

Lately i am starting to stutter, forget the use of articles and when writing down a sentence i stop halfway and start with a new one, thus creating a sentence nobody understands. I mix up words. I didn't used to have this problem, i do drugs but started long before i have had this. Also i am not nervous,... show more Lately i am starting to stutter, forget the use of articles and when writing down a sentence i stop halfway and start with a new one, thus creating a sentence nobody understands.
I mix up words.

I didn't used to have this problem, i do drugs but started long before i have had this.
Also i am not nervous, it happens spontaneous and when rehearsed both writing and speaking.

Is there any way i can test what the hell is wrong with me?
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