Dear Nikkilaird, hello
Sometimes symptoms of head injury
may be observed after few days of the injury.
It is a good sign that your vision is normal and you are not having nausea
It is advisable that have a scan of your head and neck done and consult a Neurophysican for examination.
Headache can be relieved by taking some pain killers under medical supervision but first get youself examined. Usually, if there is no internal damage, it takes few days to weeks for headache to disappear. Taking proper rest will speed up the healing.
I hope this is of help to you.