What is the likelyhood of this being cancer?

In February of 2008 I found a lump on the side of my neck in the near where my jaw and neck meet. I was young and too afraid it might have been cancer so I never told anyone. Futher investigation found small lumps in my arm pits, under my jaw, and a small lump near my groin. They are all about the size of a pea (maybe a bit larger) and have not seemed to have grown. I went to the doctor for a regular visit in 2009 and got a clean bill of health (nothing wrong with my blood test, a regular finger prick, or my physical exam) he didn't mention the lumps nor did I bring them up. (which was really stupid on my part but I was only 14) Anyways, I have had regular sports physicals since then (no blood or urine tests) and have been healthy and active all of my life. The lumps have not seemed to have grown or spread or cause me any problems in general. Could they be cancerous, I have had them for over three years now?