I hit my right temple really hard 4 days ago

Patient: I hit my right temple really hard 4 days ago. Ive had a headache since, with the pain located on the right side . It fluctuates between not very noticable to moderately painful. But now the pain has spread to both the left and right side of my head. No other symptoms have occured since the day I hit it. Is it normal for the pain to spread on the side that wasn’t hit?

Symptoms: Headache for 4 days after hit to right temple

Doctor: