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The symptoms you have described of having g bad headaches for 3 days along with a stiff neck is most likely due to migraine or a tension headache.Primary headache accounts for about 90% of all headaches.
Tension headache is the most common type of headache.It can be caused by tightened muscles in the back of the neck and scalp or in most cases the cause is unknown.This is the reason your neck is stiff.
Other causes can be neuralgia or temporal arteritis.
Most common causes of tension headache are:stress, muscular tension, vascular dilation, postural changes,anxiety,depression.
Treatment involves: Anti inflammatory medications, anti anxiety pills.
The goals of preventive treatment are to reduce the frequency and intensity of headaches.
Your doctor may prescribe preventive therapy such as antidepressants, beta-blockers, or anticonvulsants(like gabapentin).
So my best advise for you is to please make an appointment with your doctor for clinical examination so as to confirm the exact underlying cause & then treatment will be done accordingly.
Hope this helped
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