Thanks for writing your query.
You should go to the Emergency Department and get yourself examined and investigated.
A scan of your head should be done.
Nasal bleed and headache can occur after head injury
but a clinical assesment is necessary.
It seems that there is a possibilty of concussion injury
. Headache will subside within few days to weeks time. Giving proper rest to your body will speed up the recovery.
If the pain is severe you can take pain killer like Ibuprofen
one tablet twice a day after meals along with an antacid
If the problem persists, get yourself examined by a Neurosurgeon.
I hope this is helpful to you.