Headache with scalp pain. Your advice!

Hello Doctor, I would like your advice regarding some symptoms I am experiencing. This week, I started feeling heaviness and pressure in my head, along with localized scalp pain on the top of my head (vertex area). I also experienced pain over the forehead, which started after a fever last week. The scalp pain increases when touching the area or when tying my hair, even loosely. After the fever, I developed a cough, which has not completely settled yet. I do not have breathlessness or chest pain. I have been experiencing anxiety and poor sleep recently. I have already undergone investigations: CT scan of the head (August) – normal ECG – normal Blood tests – normal Thyroid test – normal I have also been taking Pores D3 (vitamin D3) once monthly and have already taken 8 tablets over 8 weeks. Kindly advise the possible cause and whether any further tests or treatment are needed. Thank you