I eat almost exclusively lamb, or mutton actually, since they don´t kill young animals here. I live in India and beef is not a biggie in the market (but I do get it sometimes, now that I know where to find it). I had the same reactions that you mention for the first month or so, going raw, and I have them still every time I fall of the wagon and eat carbs and crap for a while. Not when eating cooked carbs, but whenever I start with RAF again, fever and diahrrea and absolutely no energy. I feel certain that it is heavy detox, every time. The body is dumping toxins in the stomach and using the extra fat to bind with it and throw it out the quickest way possible. Everytime I go through one of these detoxes I feel much better after then I did prior to it, so I think that I am gaining health by cleaning out old shit from my cells by using fever and diahrrea.
Maybe what you are experiencing is part detox?

I also use more and more fermented mutton, it also gives me a strong detox for the first week or so, and then I feel that I get loads of energi, since the food is predigested and all. I just buy extra meet, as fatty as I can get, when I´m in the market, chop it up and put it in a jar, filling it properly so that there is not so much room for air. After a couple of weeks I eat it, I even like taste, and it definetely helps my digestion.
Maybe you could try fermenting.
I would just keep on eating lots of fat, white or yellow, if I were you. I am sure the body is doing the right thing by giving you a fever and diahrrea. That´s probably just what you need right now. I don´t belive in dangerous patogens, your body will use any kind of bacteria or virus that is appropriate for the cleaning job at hand.