Can i have phsychosis even if i know i are sick in my head? i got a diagnosis from a phsycriatrist last year even when i knew i was sick in my head.

Yes, One can have: Some degree of insight into their psychosis and still be psychotic.

If you think you are: Perhaps you've heard that a person suffering a psychosis will not know it. It gets a few weak laughs, but it's not true in more than some cases. Psychosis can be diagnosed on delusions, hallucinations or disorganized speech sufficiently severe to cause problems and getting worse over time. Not thinking you're ill is not necessary to be ill. I hope you find help for getting along in life. Best!