Firstly you are lucky, you did not die the next day. Usually
concussed people die the next day.
Whether you will die later, is anybodys' guess. But I don't
think the doctor will guess. He will check your eyes, your fingers,
and hitted you with a mallet, on the knees or elbow. No joke. This
is to check that your nervous system is ok. Before he decides on
the necessity to send you for a scan.
Better to have the dent checked now, than to wait.
If you want to wait, then please to the polyclinic as soon as
you can.
