RE: Too much of a good thing?
Dr Berardi recommends to start off with 6 to 10 grams of fish oil per day and possibly move up to 3 to 6 grams combined EPA and DHA.
The amount of oily fish consumption looks fine to me.
IMO tinned salmon is relatively low in omega 3 fats in comparison to fresh and other sources of oily fish.
No idea about pilchards though