I would say: think about trying to decrease food that are high in omega 6 oil, such as corn, and cotten seed oil, and ruduce you oil intake period. Flax seed, but even better chia seeds are a good source of omega 3.
DHA what is the long chain omega 3 can be found in fish oil, which is detrimental to the fish and the ecosystem an contains heavy metals, is only one alternative. DHA can also be found in micro-algea and is avalible through the internet. To much omega 3 probably falls in line with consuming to much fat in your diet and the health consequesces associated with it.