Persistent headache

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I had one last night, I went to bed and fell asleep. This morning was fine but now this headache has come back. I’ve read it normal to have head aches at this time and age, but what would be consider “abnormal”? Since everything can be a symptom of something, and I always think the worst, my first thought is pre-eclampsia. But I really want to believe it’s just a sinus head ache!