hi, thank you for your query. what you are experiencing is Post-concussion syndrome, also known as postconcussive syndrome or PCS, the most common symptoms include headaches,stuttering,dizziness,mood swings.shaking etc the prognosis of PCS is excellent.For most people, post-concussion symptoms go away within a few days to several weeks after the original injury occurs. In others, symptoms may remain for three to six months.but usually they completely resolve within the said period. so vomitting is normal during this period.its good that the pupil test and BP are normal,it shows that brain didnt get damaged. for treatment just minor head monitoring and rest from activities involving severe jumping,rolling,falling should be avoided for the said period.. a cat scan or MRI are only required if you develop sudden severe headaches or loss of vision.till then rest should help a lot. thank you, you can contact me for further queries.