It could be that you have a candida infection. Sugar feeds candida (yeast) and it could build up and become more of a problem all of a sudden like this. I actually think candida is blamed too often as a cause for ALL health problems, which I don't think is the case. But I do believe that it can affect you. You can get rid of it but sometimes it is stubborn. There are supplements that will help, plus you want to avoid bread for a while and sugar even longer.