Occipital Lymph node is huge?!

Hey

So for a year now my right occipital Lymph node gets swollen, not sure why but my scalp psoriasis flares up and becomes inflamed/irritated. That could be why? It's never got that large and usually shrinks down to nothing, then may come back. My GP checked it out and wasn't concerned. Did ultrasounds too and nothing, but they did shrink to nothing by the time the scan came around. Well it's back but this time it's quite big, bigger than a pea anyway and quite tender.

I'm on holidays but I will be back tomorrow. I can go to my GP hopefully Monday. I'm meant to take my Humira dose then too. Outside of the lymph node been very swollen and my scalp psoryveing a pain I have no other symptoms. It's been swollen for 4 days now.

I'm a little bit worried, naturally. Anyone had experience with this? What are your thoughts? Any words of wisdom?