Hit front, top of my head yesterday very hard on dryer door. Neck & jaw instantly hurt, head felt warm, like it was bleeding. Instant headache, red mark. Today still painful. Hurts to touch and dizzy. Kind of groggy. ER?

Be seen. You may have sustained a concussion, which should be evaluated promptly. Please be seen in order to have a diagnostic assessment and treatment plan created.
Yes. Dizziness, headache, nausea and vomiting after head injury definitely require doctor attention. Even with dryer door hit this is possible concussion. Still need evaluation and treatment. .
Yes, go! If your headache is not relieved by over the counter pain relievers taken as prescribed on the bottle only, and/or your thinking is not clear, you need to go to the ER. Good luck!