I purchased the above fish oil (xtend life omega 3 / dha fish oil) and for me it doesn't work at all , in fact it's increased my problems and made them worse. like increased uncomfortable cardiac palpitations and insomnia to name but a few problems. based on personal experience I won't be trying this one again, just reading the thread again I see that someone else had the same reaction ,one mans poison is another's potion, maybe it might work for you...
That would be the side effects of fish oil, give krill oil a go. I had a bunch of problems when using high dosages of good quality fish oil. Switched to krill oil and I don't have any side effects.