Please please help

I have a headache every day when I wake up (not near phone) and when I go to bed (using phone) and spurts through out the day 15 minute incriminates. I have had these for 3 weeks now but not sure why. I have a appointment with optometrist soon and hoping it’s just my vision (I have never had glasses before). Any other ideas? Cancer? I’m not even near my period so it’s not PMS.