Headache as pregnancy symptom?

Emma

I've read that headaches are common in the first trimester and that it could be a symptom. I've been having a bad one for more than 24 hours now; soothing it slightly with paracetamol at times but it comes back. I'm only 8dpo so I know that it's early days for symptom spotting. Just wondering if anyone had an experience like this and it turned out to be pregnancy related?