Should I Meet Doctor For Severe Neck, Head And Back Pain?

Hi there, I have been experiencing severe neck and head pain on the left hand side at the back of my head and a small occipital node can be felt as well. It is about the size of a small pea and is not sensitive unless pressed very firmly. I have had this problem for approximately 2 months now. When I take in deep breaths I can also feel tightness and pain in the left hand side of my throat. I am not unwell, haven t had any colds or flu or throat problems. Nodes in my groin and thighs can also be felt on both sides, and I am experiencing severe lower back pain. Should I consult my doctor about this? Regards, Russell Birchley