My husband got stuck by a black locust thorn a month ago. He went to the doctor a few hours after getting stuck because he spiked a fever and his hand and arm were very swollen and stiff. They cleaned it out and started him on antibiotics. He completed his 7 day course of antibiotics which was about three weeks ago. So for the last few days his hand has been sore and tonight he spiked a fever again and he is having the same symptoms all over again. Should we go to the ER or wait until Monday?