Are you there?
I am here
Headaches are always a concern. Are you nauseaus? Dizzy? It has been two days since your fall - it is a good sign that you have not developed any significant symptoms. I assume you did not lose consciousness? If so, you must be examined, even without symptoms. If not, the signs to watch for are increasing headache/pain, nausea, vomiting, change in vision or mentation, or loss of function of any part of the body. I assume you have none of these?
please review my answer thus far
I have no side effects except the dull headache
is it getting worse? Exactly how long has it been, in days or hours since the fall?
it is not getting worse and it has been 48 hours