If schizophrenia, the onset is usually around the age of 20.  Also, the use
of drugs like amphetamines can cause symptoms that are like schizophrenia.

If I had the problem, I would use alcohol vapors in the style of a home
remedy for colds.  You heat water in a large bowl until very hot, but not
boiling -for safety.  Pour in an alcoholic beverage, such as vodka.  Place a
large towel over your head and place your head over the bowl, so you are
breathing the alcohol vapors.   It might not help, but who knows?  My
thinking is that an infection may be stimulating the olfactory cells.  A
vapor bath of alcohol might kill bacteria and viruses in the area.

What do you typically eat? Give us an idea of your current diet. Give
us a typical daily menu.

TC

Your body is short on essential animal proteins which is causing a
chemical imbalance and probably mild brain seizures.  This is a common
ailment of people who do not eat any meat at all or have a gluten
allergy which prevent proper absorption of nutrients.

Despite what the vegan religion says, humans are omniverous and require
a small amount of red meat every day.  The total daily red meat
required is typically one egg and 16oz of milk and 2.5 oz of any kind
of red meat (double that amount if you do rigorous exercise in that
day).  The other option is to eat approximately 30lbs of beans, corn,
and other balanced vegetables per day, along with fish and chicken.

Time to have a complete blood work up including all the nutrient and
protein levels.  Then you will know where your body stands.  You
probably need to have a complete food allergy work up done as an
allergy to any one thing you are eating will prevent proper nutrient
absorption all day long.

I am betting that you fatty acid blood levels are seriously too low and
probably causing the problems you are experiencing.