Last Friday, I fell straight onto my back and hit my head on concrete. I believe I had a concussion. It s a week later and I feel symptoms of occasional nausea, extra drowsiness especially upon waking, dizziness, and pressure in my head. Should I see a doctor? I don t have insurance or any money to pay for a cat scan, and not sure what they can really do for this, so I haven t been. I have been going to work as usual (bartender), and doing most things. I am more tired than usual and have persistent head pressure, and feelings of cloudiness. From what i ve read i may just be having these symptoms for some time until they fade. But can you tell me if there are particular signs i should pay attention to and see a doctor?