Lymph nodes can be swollen for many reason. But as you said it’s most likely from strep. Are you sure it’s a lymph node? When lymph nodes swell up it’s usually our body’s fighting a virus off. I wouldn’t worry about it.
Yes. Absolutely. The lymphatic system reacts to infection or illness in the body that it is trying to fight and a lymph node can swell. Very normal. Hope you feel better