Welcome to Health care Magic.
I reviewed your history.
It seems from the history that you are having headache following slipping with injury
My response to your question is as follows.
The injury to the lower back is not responsible to your headache or it appears like just a referred pain
You need to take analgesic
tablets and if the symptoms does not show improvement then you need to consult your doctor for examination and treatment accordingly.
Hence I advice you to consult your doctor for examination for confirmation of diagnosis and treatment accordingly.
Hope this information is helpful to you.
Do write back to me for any further questions and I will be happy to answer and assist you.