Pea-size lump on left side of neck

I have recently discovered a pea-sized, round lump in my neck.  It is about 2" above the collarbone in line with my left ear lobe.  I felt another slightly larger lump about an inch higher.  This was about a week ago.  They are not painful and I recently had a bad cold virus/cough thing that lasted a good 2 weeks - in fact I still have some residual congestion.   The only reason I discovered this was because a friend of mine fighting lung cancer discovered lumps above her collarbone and I just started poking around myself and needless to say  I got a little panicked when I felt this.  They have not grown since I first felt them, they seem 'slippery' - like they kind of move a li...