Why Is The Bump On My Head Growing?

hi , i got hit on the hit with the corner on my sofa when i fell. I went to er cuz bump was pretty big and i had a major headache. the cat scan showed no bleeding.. However, its been two weeks and the bump is now the size of a quarter . Its also hard . feels like a glass ball. I also have a hard time opening my mouth fully. It hurts. Should i go to the dr again or this is normal?