after suffering a blow to the head,i had a headache for about a week,however i did not seek medical attention.the headaches went away for about 2 months then i was rushed to emergency with dizziness and light headedness,and blood pressure 188/89 after ct scans and other tests they could find nothing wrong.i was rushed to hospital 2 weeks after that with same symptoms plus my whole body was shaking.now i have been diagnosed with post concussion syndrome.is it possible for this to happen and how long will it last.i am still suffering with constant headaches and ringing in both ears