It is possible that all of this is due to an allergic reaction, which is causing drainage and swelling and accompanying discomfort. It is also possible these symptoms are due to a viral infection. In the short term this, too, can produce the same symptoms. While Strep infection is possible, this is not the most likely since you have not had a fever, redness of the throat or a very sore throat. If the symptoms persist, you might want your doctor to evaluate you and perform a culture.