Well your symptoms suggest that you suffer from Pericoronitis, which means that the gum tissues around your wisdom teeth
become inflamed, on and off. It's very common with the youngsters these days as the nature is slowly eliminating the not quite used wisdom teeth as part of an evolutionary process, because our diets have become too refined, so there's not much use of extra teeth to chew the food. You should not panic
and immediately visit a dentist
for the check-up. He would take an X-Ray of the affected tooth and will suggest you the remedy, most probably being a "painless" extraction of the tooth. Meanwhile, just
try to maintain a good oral hygiene and occasionally rinse mouth with lukewarm water with a pinch of salt added to it. It serves as a natural mouthwash. Private consult's welcome. Take Care!