Continuous head pressure/neck pain, shoulder pain, eyes sore, temple pressure, scalp sore, jaw clenching, anxiety, for 2 weeks. Anxiety about brain tumor

Not likely a tumor. A brain tumor is pretty far down the list of possibilities. I think you have pinpointed the most likely cause yourself: muscle tension. Neck, shoulder, temple, jaw muscle tightness and pain create anxiety which causes more tightness which causes more pain which ... I don't discourage you from seeing your primary care physician but I think you can worry less about a brain tumor. Feel better!