Well the salt mouth-wash worked, even though I forgot to take further doses. My gums cleared up and there has been no more pain.
This bit of news popped up tonight. The scientists involved seem to be arguing that western diet has switched to an unhealthy balance of omega 6 and omega 3 oils in the last century. So we may not be alone in needing to increase omega 3 consumption. There's not necessarily much new here - it's been known for a while that fish oil improves heart health.
It all serves to reinforce what I discovered originally about the omega syndrome. It's just odd that not many people seem to know about it.