On the question of whether you need more Omega-3, we can be very brief: The chance that you are currently taking in enough omega-3 is only 1 in 10. 

Scientific research has specifically shown that no less than 90% of the population has a shortage of omega-3. Of this 90%, half even has a severe shortage of Omega-3.

Omega-3 contains essential fatty acids that are active in all body cells and body tissues. They help the body function optimally. To get these essential fatty acids, we depend on our diet. The body does not produce Omega-3 itself.

Many studies have been performed on Omega-3 and are linked to several Health Claims.

You can see a video about the importance of DHA here: 

Should Vegans Take DHA to Preserve Brain Function?