Grammy ~
Forgive my tardy response but I wanted to assure you that tinnitus and headaches are not preordained with AN surgery. Like others who have already posted on this thread, I didn't experience headaches before or after my AN surgery - and my AN was large. I also underwent radiation (FSR). Again, no headaches.
As for tinnitus, some AN surgery patients do develop it following surgery but it is not inexorable. I had mild tinnitus prior to my AN surgery and it remains at the same (tolerable) level, today, six years post-surgery and radiation.
I do have to add the caveat that one - or a dozen - AN patients experience following surgery should not be assumed to be a template for every AN surgical patient. We are unique and there are a lot of variables involved with this condition and it's removal surgery. However, I wouldn't presuppose that tinnitus and/or headaches are inevitable with AN surgery. They are an unavoidable risk you should be aware of but not allow yourself to get stressed over because many AN surgery patients do not have these issues, post-op.
Jim