Hi Linda and welcome to the forum.
It would be useful to get some background information. How large is your tumor? What prompted you to get the AN diagnosis? What were your symptoms at the time? How have symptoms changed since diagnosis?
These are typically slow growing tumors so, see a doctor now, but you can wait two weeks before coming to a conclusion. Things like an infection can cause similar symptoms. This happened to me and after a course of antibiotics, I was back to normal. Also I got a headache and then remembered that I skipped my morning coffee. So, not all symptoms are due to an AN. Conversely, not all new symptoms are not due to to an AN. I think about the only reliable differentiation is to see a doctor if need be and wait two weeks (or more) to see what happens.