Best choice would be to approach a MD doctor. Headache and vomiting can have central nervous system causes. The MD doctor can check you CNS to see if everything is alright. Since, CT looks to be good, you can double check with him to see what signs he finds clinically.
Thanks for the query.
Next Steps
Approach MD (medicine) doctor
Health Tips
Headache and vomiting together can be due to a number of causes. However, there are some conditions which may be emergent in terms of treatment. Suggestion: get it looked at by the doctor as soon as you can!