Understanding why fish oils make me anxious

Hi there, new to the forum. I have searched the web high and low and found no convincing explanation why fish oils should worsen my anxiety. But I am keen to know so if anyone understands brain chemistry, please share!

I took EPA fish oil, felt good for about 6 hours, then very anxious indeed. I know that EPA is affecting neurotransmitters such as serotonin, norepinephrine, acetylcholine, glutamate, and dopamine.

I've been wrestling with this anxiety for 15 years now - it began after a major car accident. If I can understand this, I hope I might zero in on what neurotransmitter is out of whack, and then try more specific supplementation...