Welcome to healthcare magic!
It is a very subjective feeling to get the idea of severity of impact.
If you did not loss consciousness, or did not have dizziness
at or immediately after the impact it is likely that you have only scalp injury
Scalp injuries are typically very painful. If there is a gaping wound it would need stitches.
If wound is there but no gaping then just keep the site dry.
And lastly there may be only swelling but no wound.
In first two scenarios you you will need antibiotics.
And you would need pain killers and anti-inflammatory medicines for pain.
I do not think you should worry much.
But if you had signs I have described in the opening then you should undergo a CT Brain and checkup by your physician.
I hope this advise would be helpful for you.
Still if you have any queries or doubts, please write me back,
I would be happy to solve them.
Wish you a great health!