Suggest Remedies For Headaches And Confusion After An Injury To Head

i hit my head after falling 3weeks ago. I recieved 11 staples at the time and havent felt great since it happened.

I went back to the hospital a couple of days after but they said they wouldnt give me a scan unless I had been sick 3 times in 24hrs, was becoming confused , couldnt be wakened or very unsteady on my feet.

I have been extremely tired since it has happened and I get regular headaches (both of which I would never have experienced before the fall). Should I go back to the hospital?