 [ Symptoms ] i had a large injection of penicillin for strep 2 days later my lymph nodes have swollen substantially is this normal  tuesday afternoon i started feeling sick sore throat cough body aches fatigue headache thursday it felt so bad i went to the er they glanced at my throat declared it to be strep shot me full of steroids painkillers and penicillin then sent me on my way i began to feel better that day and yesterday felt mostly normal except for a persistent productive cough and weak voice but as of this morning my lymph nodes are absurdly swollen and very tender possible explanations [ Disease ] do blood test to confirm urine test is not conclusive