A few days ago my neck was aching me and felt tight. I put it down to a tight neck muscle but then I started feeling about and felt what I think is a lump but I’m not sure. It does not protrude out of the skin and can’t be seen. I can only feel it when I push my fingers into the side of my neck. I don’t know if it is a muscle knot or something more worrying, I’m so scared :(