I’m 20, female, I tested positive for strep on Friday

Patient: I’m 20, female, I tested positive for strep on Friday and was prescribed antibiotics, it is Sunday now and my whole left side of neck is swollen, sore painful, it’s like every lymph node is completely swelled. Its like a golf ball off the side of my neck. Its affecting my speech, I can’t lay down or move my neck, Idk if I should go to er?

Doctor: