IMHO, Omega 3 increases GABA and Omega 6 increases Glutamate. I am going to guess that if you ever smoked pot that high THC weed makes you severely anxious?
Omega 6 creates an endocannibinoid that is more like Delta 9 THC and Delta 9 THC increases glutamate release. This will cause psychosis in people who have high glutamate levels or low GABA levels.