Mel,
I have just turned to this forum, because I too have been concerned about re-growth (after 25 years). As I am deaf on the AN side due to the tumor (it was surgically removed in 1988), my primary tip off that something was wrong is no longer available, which really makes it hard to assess what is going on. Am I obsessing about something that is due to enormous stress or is the tumor really rearing its head again? (My AN side facial and tongue numbness have returned). I posted a similar question and got one response - which basically was "what are you waiting for?" That was enough to send me back to Dr. Wiet. He was verbally reassuring - stress can do strange things to the body and it is extremely unlikely to get regrowth so far out, BUT, in the next breath, he said - you do know that you will need an MRI, don't you? I am scheduled for this Tuesday.
I do agree with Jim - this forum is not composed of doctors. The members really can't address this type of concern. I do hope you make an appointment with a doctor, though. There are many reasons for head pain - your doctor may be able to put your mind at ease a little and an MRI may not even be indicated. Even if it is, the doctor is the one who can help you assess the potential risk of waiting until you get insurance or until you can afford an MRI.
Good luck.