Girls, on Wednesday I took the kids to the clinic because my middle child's lymph node was inflamed…

Girls, on Wednesday I took the kids to the clinic because my middle child's lymph node was inflamed and painful, and my youngest was coughing intermittently – a dry cough, especially at night, he started coughing a lot. Neither had any other symptoms. I don't know if they caught something at the clinic (even though it wasn't crowded) or if they picked something up elsewhere, but my youngest started getting a little runny nose that night. The next day, I started nebulizing him with saline, his cough became more productive, and at night he was coughing up mucus 🤦🏼️ And my middle child developed a cough and a sore throat today. So, they gave us referrals for blood and urine tests. For my middle child, because of the lymph node, in case it's cytomegalovirus or Epstein-Barr. And for my youngest, because of the dry cough without other symptoms, in case it's viral pneumonia that isn't detectable by auscultation and they said it might not even show up on an X-ray right now. And now they're both sick, but without a fever. Should I get the tests done now, or wait until Monday?? On Monday, he also has an ultrasound of his neck, where they'll check on the lymph node.