Hi all, A month ago I received organic acid test results - I had overgrowth of yeast and bacteria - the ND gave me oreganum tincture and a probiotic - the first 4 or so days I had die off (from the feel of it) of the overgrowth - felt great on the 5th day so did a lot (relatively) of walking and crashed that evening. My pem has been worse since, as in my 'threshold' before symptom onset is lower. Usually I would have recovered by now and be able to walk on flat ground. I stopped the probiotic 4 days ago to see if that helped but have not noticed any difference. Perhaps the oreganum tincture is promoting pem?