I just had my second dose of the Moderna vaccine yesterday. After the first dose 4 weeks ago, all I had was a sore arm for a couple of days. The last 24 hours after the second dose, however, have been awful. Horrible chills last night and then wakefulness until 5AM when I was finally able to get 90 minutes of sleep. Very stiff and sore today, along with a fever.... Ugh!