Head Pains

So, I have been diagnosed with somatic symptom disorder, but this does not quell my fears. Recently I have been having pains that last a few second all over my head and neck. They scared me so much that I went to ER and left with no diagnosis other than anxiety. This has increased to sometimes feeling very specific lines (veins?) that feel like they lost circulation, mainly in my right arm but sometimes in my neck. I'm very worried and would like to know if anyone might have this experience or an explaination? I'm trying to remind myself that this is because a few days ago I had a very bad panic attack, but it is not helping.

I don't have a Dx, but I find when I worry about a particular thing, it really takes off and seems to get worse. I've been obsessing about my head for a long time now, and my head and neck stay tense and stiff.