Saturday I noticed my neck had a small lump that was a little sore. Today, Sunday, I woke up early because the lump had doubled in size and was extremely tender to the slightest touch. As the day progressed the whole left side of my neck became stiff and excruciatingly painful from any movement.
I tried using ice to relieve it, but it made it even more painful.
This lump is on the back left side of my neck about even with the hairline, but not in it. It is a very deep hard lump about the diameter of my 2 fingertips, and there is a pulse in it.
Just placing a finger over it with NO pressure is nearly unbearable.
I do not have allergies, have not been exposed to anyone with sickness, have had no fever.

What is this likely? Is or could this be life threatening? Could it be an aneurisim?
Would this lump following other present symptoms point to certain diseases such as lupus or Hodgekins disease? Could it be a cancer?