Hello and welcome, MsSerenity ~
Your headaches do seem unusual for someone a decade past their AN removal surgery. I'm just 3 years out and so far, no headaches. However, I'm sure others will post to this thread that can possibly offer some ideas on this.
Ultimately, I believe you'll have to consult a physician, preferably one who is familiar with acoustic neuroma patients and the complications that sometime follow AN removal surgery. I have to offer the suggestion that the head pain you're experiencing may not be related to your AN surgery. However, an MRI might shed more light on that possibility as well as answer other questions. I would attempt to convince a doctor to order an MRI to at least give you the opportunity to learn if there is any visible cause for your headaches. If not, seeing a pain management specialist may be your next best option.
Jim