When I was poorly a few years ago, the 'in thing' was milk. It made me feel ten times worse! I tried a small amount of yoghurt - same effect. It doesn't always work. I'm off to read your link Stanley.Glad it was helpful. I remember how frustrating it was, doing exactly what the professionals told us to do and finding that it usually made a difficult situation more difficult.
I also found, BTW, that some of the dietary things we were doing were not helping. For a long time I gave Sue raspberries and probiotic yogurt every day. When I stopped, there was a big improvement - a shame, because she liked them. The only times she's had raspberries and yogurt since, there have been fresh problems. The yogurt might not have been culpable but I now avoid it to be on the safe side.