Silly question, but have you had dental work done prior to those 6 weeks? Even a small filling?

An out of line bite can cause headaches.

Hi,

yea I did have filling end December, but I have been having headaches from November.

It could still be a bite problem. Believe me, even out a little, a bite that is ever so slightly off, can cause brutal and constant headaches.

I'd go back to the dentist and have the dentist check your bite. It's a simple procedure that involves putting a piece of paper between your bite. Takes minutes. Seen so many people suffer headaches, and anxiety and tests because they've assumed it had to be something major. Turned out it was their bite. That tooth that got fixed may have been causing you to alter your bite subconsciously.