constant headache

Lately I have been feeling constant headach for the past 2-3 days. It won't go away. When I wake up in the middle of the night or in the morning - it's there. I really don't want to take anything for the pain therefore I'm sucking it up.
I just want to know if anyone has been experiencing this too. I feel the pain in my forehead and towards my right eye- it's like a migraine.
I'm 13 weeks and I've been feeling headaches here and there throughout my pregnancy but they only last an hour or so and then go away for days. But this time it's lingering.