Hi, I Hit My Head About Once A Month Ago,

Hi, I hit my head about once a month ago, and I had a splitting headache for a couple of days. I couldn't focus on what people were saying to me. I figured it was just a concussion and would go away, but there is still a large bump on my head, and when I speak, sometimes I mean to say one word and another word comes out or I cannot say what I'm trying to say. I feel easily confused. Will this go away on its own?