You may have gotten a little minor ding to the temple, but logically I don't think it is a concussion event.

If you had internal bleed there would be some color changes in the area & under the skin.
Is there any scrape or red mark at all where the bump happened?

[It is not out of the realm of possibility that this is psychosomatic. I have been known to worry about my health. ]
This may be the main factor in this case..
But a check with a MD may calm your concerns.