Mucous is caused by allergic response. More than likely something you are eating ( food reactions can be delayed 24-36 hours on average), or something in your environment. Could even be your bedding or whatever detergent you use to wash it. Keep a food diary, try switching your detergent to a free and clear brand, and perhaps get yourself an air purifier. Not everything is because of candida. Those of us with adrenal issues are prone to worsening allergies. Welcome to AF :)