Help Help! Is it brain trauma?

My little sister was holding a golf club (don't ask why) and I was laying down watching a movie when she drops the golf club on my head! It hurt right away but then I didn't feel anything. Now I am scared I have head trauma like Natasha Richardson and I am so scared. I looked up symptoms and have dizziness and drowsiness! My mom and dad said it's probably nothing and won't take me to get ex rays because they are expensive! Help