does make you weak as you suffer from blood loss.
So weakness can be the cause of your headache. You need to ensure healthy diet with plenty of fluids.
Also the other possibility can be a viral infection which you have acquired from your family. It does present with cold, fever, headache, weakness, fatigue and lethargy
You need not worry about these. You can definitely travel.
You can use any of the pain killers like paracetamol
which would relive your headache and improve the viral symptoms too.
If your hemoglobin
was on the lower side that is below 10 g% prior or after abortion, you need to take iron rich diet. This is because anemia (low hemoglobin) can also present with chronic headache.
You can start an iron supplement for minimum one month to improve your hemoglobin levels.