I recently bought pre-sliced baby bella mushrooms and made a raw soup. I did not clean the mushrooms before, as they were sliced and would soak up a lot of water if rinsed. The raw mushroom soup was delish, but about 5 spoons into it I got nauseous and lost my appetite (this never happens). I felt grossed out thinking of what germs must have been all over those mushrooms. The rest of the day I had an increasing headache. Where I have enjoyed cooked mushrooms for many years, I am new to raw and do not know how mushrooms should be handled if one does not intend to cook them. What is safe?