What Causes Swelling In The Gums And Sensitivity Of The Teeth?

I just got over a cold, it was an upper respiratory cold. Cough, mucus, sinus pressure. A few days after feeling 100%, I woke up and my glands in my throat were swollen. The next day my gums behind my molars were swollen and extremely tender. I feel sensitivity in my teeth, gums, and what feels like my teeth roots. I'm 28, female, 117lbs, 5 1', healthy, not history of gingivitis or anything of that nature. I received my last cleaning last year. Recently had four fillings replaced in my upper teeth, about a year ago. I still have older fillings on the bottom. Wisdom teeth were pulled in 2006.