Allergies generally do not include fever as a symptom.

fever thing is right, also snot is supposed to be clear if allergies, colored if illness

a cold can come any time of year, and lasts for a week or so. somstimes includes a feveer. allergies come about ehe same time every year, no fever.

echinacea and astragalus, a good antioxidant formulation, an herbal tea blend, thats about all i can think of

echinacea tea is very good at helping you body to fight illness. Also to improve your breathing put some eucalyptus oil in a simmering pot; it will help to open your nasal passages without drugs and allow better oxygen saturation. Ensure that your extremities are kept dry, wet hair can reduce body heat and WASH your hands! most “colds” are viral and are transmitted by contact.
The best and most accurate way is outside of medical testing with your doctor. People can be allergic to nuts, flour, pollens and many more stimuli. Many can affect respiratory performance.