Started feeling unwell with sore throat last Friday, took test sat and was positive for covid. Felt pretty grim and run down since... Runny/blocked nose, slight cough, headaches, dodgy stomach, nausea being the main symptoms. Thought I was starting to gradually feel a little better the last couple of days but this morning I've woken up with a headache and very swollen lymph node on the right side of my neck, it is visible to see without needing to feel it. Slight pain to it as well. Is this likely to be caused by the virus? I've never experienced swelling like this before.