My Daughter Threw My Cell Phone At My Head And

My daughter threw my cell phone at my head and hit me in the left temple. I had a headache afterwards and I have a history of headaches. Now comparing my left to right side my left side feels like there is a hard bump (feels like bone) and my other side doesn't have it. it has been a few a few weeks since the cell phone incident has happened. What could the bump be? It doesn't show on the outside just feels like the bone is bigger than the other side under the skin.