got hit on the head while loading a hand truck at work almost 3 weeks ago, it bounced forward as I was crouching down loading it and hit me just above forehead . I saw black for a second, but thought I was OK so finished the job. there was a bump and it hurt, a little scrape, some blood. 3 hours later it was pulsing a bit so I went to ER for CAT scan, there was no concussion just bruise and bump. took about a week for bump to go down, seemed OK at that point. since then I notice my vision seems blurry from time to time, and I get sharp pain in injury area that awakens me at night. I thought it was no big deal and would go away but it hasn t. Going to see my MD soon as possible. any idea what could be going on? appreciate your thoughts