I'm curious, what about your exercise plan has your MD thinking it is part of the problem?
How much fat and protein, and from what sources in general?
I prioritize CLO over fish oil.
2000iu/day of Vitamin D from CLO, rain or shine.
If you want to add fish oil on top of that, then get up to 2400mg of total EPA+DHA per day.
I personally take 300mg GLA per day from borage oil, that may help as well.
Make sure you are getting plenty of zinc and magnesium.
What do you do for a living or recreation where you might be exposed to toxic stuff? In the past or present?