Our expert says:
Malaria will typically present with a very high fever and malaise. I think that you should consult your doctor for an exmaination and maybe an x-ray of your cervical spine. Severe muscle spasm can cause quite a severe headache. Your symptoms did improve after taking non-steroidal anti-inflammatory medication and therefore, the headache is most likely due to a muscular skeletal origin.
The dizziness when getting up, is most likely due to postural hypotension and I suggest that you keep yourself well hydrated and rather get up slower, in order for your blood pressure to stabilise.
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