Hopefully this will make you feel better.
Around this time last year I had the same thing. The headaches were always in the same spot in my head and happened daily. They weren't debilitating, I had no history of migraines, and they seems to be out of nowhere. So I had an MRI. Everything was fine. The headaches went away after a month or two.
Doctors thought it might have been allergies (I have seasonal allergies but in the spring, not the fall, typically) or a hormonal thing because I'd weaned my son in June/July.
I haven't had the headaches again.
Good luck. I know it is scary. Glad you are going to a doctor.