@ProAgonist:

You know, I would find it really helpful if you posted the links where you get your information.

Medical information changes rapidly and also various sites regurgitate other places and often the information can become skewed or that copied old and out dated.

For example I searched "fish oil immune" and found this:

http://www.inquisitr.com/599029/fish...tem-new-study/

An example of sites I find problematic are LiveStrong-- it can be accurate on some things but not others.

This subject is commonly covered on PubMed. We have a link at the top of our pages here in fact so you can get there easily:

http://www.ncbi.nlm.nih.gov/pubmed/25471799
http://www.ncbi.nlm.nih.gov/pubmed/25244229

Dr. A Simopoulos MD has 55 papers currently on PubMed:
Just type in "Simopoulos Omega-3" into the keyword search.
http://www.ncbi.nlm.nih.gov/pubmed/21279554

While I think 18 grams was unwise to start with, there is no reason you should avoid Omega-3s... in moderate amounts.
2-3 capsules a day is quite a small amount.
These oils are FOOD not a drug... they are consumed in larger amounts than vitamins and minerals, because they become building blocks of our tissues and are used just about everywhere in the body.

Rodent studies are interesting and less expensive to run. But mice and rats have a different metabolism when it comes to Essential fats. They require much higher % of dietary Omega-6's than humans do. Also statistically mice and rat studies only pan out about 60% referrable to humans. So they have to be evaluated carefully. They are the beginning and not the end for making conclusions. Further work is always needed after studies using rodents.

Laura Stevens at Purdue University has been researching diet and ADHD for about 25yrs. It was her study I used to initially further research Omega-3's.
http://ajcn.nutrition.org/content/71/1/327S.full
To learn more about them from authored books:
Donald Rudin MD --The Omega-3 oils
Barry Sears PhD-- Enter the Zone (explanations of EFA chemistry and diet)
Artemis Simopoulos MD-- The Omega Plan

Most of these books are old by now...but are good basic learning tools to understand this complex subject and chemistry. There has been much more recent work done and probably newer books out by now.
These older books are on Amazon used...for a very low price.
Some libraries may have them too.
You will learn how some major drugs also work, by reading well on this subject. Aspirin, NSAIDs, steroids, and insulin all impact the synthesis of the various cytokines in the Cox-1 and Cox-2 family. (they used to be called prostaglandins PGE1 and PGE2).

And going to an ENT is a very good idea. Many of your head symptoms (including the blocked ears now) may be a sign of sinus congestion/infection, or another upper respiratory inflammation.