Just do what Dr Apporva suggested. He is right that for SOS you just need to take a painkiller that is OTC. But if your headache are frequent or different from previous headache, maintain a Headache Diary and consult a Neurologist for helping you sort out your headache. May check out my article here: https://www.knolead.com/post/how-can-you-diagnose-your-headache-syndrome.
Next Steps
maintain Headache Diary or Log
Health Tips
If headache increases or persist please consult a Neurologist.
warm regards.