I ate a couple of pieces of cadbury chocolate and this has happened twice with the same chocolate, a constant feeling of razor blades in my throat and a feeling to cough , but I do eat a huge amount daily and I never have a problem , but its quite scary, because it is not going away and I am drinking fluids, its feels the same as when I use bleach to clean, an overwhelming feeing when you breath it in, but then it goes if I get air, this is not going away though,