Suggest Fish Oil Supplements That Do Not Contain Mercury

Hello.. I take Lovaza 4 grm a night... Cardiologist suggested it was ok to take over the counter because of price. I am fearful of stopping this drug as my CRP hs is always VERY very high. It was 6 last time ( November) and has been as much as 9 This has gone on for years. I also take Crestor and Tricor ( generic Tricor) . Question is I worry about the mercury in over the counter omega meds. I want this inflamation in my body to subside ! Lost 50 lbs over 2014 got 50 plus to go. I am female. 56 yrs of age. I actually just today... had a nuclear stress test... Dr called saying it was NORMAL.. I do not mean to offend, but I have high anxiety, and wasn t able to take my beta blocker before ( Nadolol) and I was very nervous. It was with contrast or whatever... I stayed on treadmill 6 min and hr got up to 158 or so... I just switched Cardiologist about two yrs ago and have only seen this one a few times. I fear dr s. ( so sorry) Oh, my EF was 77 % .. but on my echo cardigram I had 18 mo ago it ws 60-65.... Can anyone suggest a fish oil that has no high mercury... I really on t want to stop this med as I feel it may raise my tricllycerides again... Thank you thank you thank you !!