Is this a sign of anything?

Heather • Wife 3/28/15. Mother of 4 furbabies. TTC #1
Last night a headache started and I got a little dizzy, headache increased through the night so bad I felt it pounding and it made me even more dizzy. It has gone away some finally, but still feeling off. Is this any type of symptom of anything done along with conception? AF not due for about two weeks.