Sneezing all day and have a sore throat. just traveled. not sure if it's allergies or if i'm getting sick. how would i know?

Past history: I suspect that you are more likely to have a cold (sore throat) than an allergic reaction especially if you had not experienced such symptoms frequently in the past. People respond to a cold quite differently with some having little or no symptoms and others bedridden from it. If you don't feel sick, don't worry over it. If you do, then it's likely a cold.

Cold or allergy?: Greetings. This question will keep being asked long past our days. A cold is usually accompanied with pain, fever, thick post nasal drainage and congestion. Allergy is usually a watery thin drainage with itching, sneezing without fever or discolored mucus. These are not written in stone by the way so crossover symptoms can occur. See your doctor for confirmation.