Can antibiotics cause swollen lymph nodes?

I’m just getting over strep and was prescribed clarithromycin. I got better almost immediately and was feeling fine until I day or two ago when the lymph on the right side of my neck started swelling and hurting. It got a lot worse today. It’s not as bad as strep, but I have no other symptoms. Is it just a side effect of the antibiotics? Is it leftover strep? What is it?