Anyone taking fish oil prescribe by gynea

I can't take fish oil capsule as I keep burping the fishy smell. But I realise I can take fried fish like fish n Chips. Other than this can I take other fish like fish soup? Cos I understand fish has mercury which we have to eat selectively. Anyone don't eat fish at all throughout pregnancy? Is OK de right? I'm a fish person before pregnancy but not now... Still v sensitive to smell....20weeks..