I had a head injury. For some scanning?

I went to canal for swimming in night on 20-May-16. There I had a fight and I was hit by a bamboo stick on my head (left side above ear). I was unconscious for a second and fell into the canal. I came out and found a bump on the head and little bleeding from my left ear. I consulted a doctor and had some medicines. I didn't went for some scanning or surgery because I was well, my body was responding well, no senselessness. One of the medicines I remember was MEGANERVE FORTE. Now after almost one year sometimes I feel some heaviness on my left side of head. A little sweet pain occasionally below the left year. Nothing except this. Do I need to consult a doctor and go for some scanning? Please advice.