What Causes Severe Headache In A Patient With Meningioma Tumor?

please, i had a menigoma tumor the size of a large orange removed apprx 10 years ago at stanford univ hospital. they were not able to get all of it and 5 years later after a MRI they found it to be growing back. at that x they did a cyberknife radiation surgery. now lately the area that was cut open & removed to expose the tumor has become really sore. i hav also felt kinda confused at times ( no seizures ever). i am a retired Police officer of 26 yrs of service. at the x of my original surgery i was told it was a slow growing tumor that had been growing for apprx 15 years. i knew something was wrong when i started loosing my memory, my ability to speak, & lost my sense of smell & taste. i can speak now, still sense of smell & taste is not good, & memory is diffinitely not what it should be. can no longer multi task do to problem with not being able to focus. i am just not myself. please can u help me. i am 68 years young & was always sharp and could do 14 things at one time. my head is quite sore to touch on area that was cut open, & i am having nagging headaches lately. pls help!!!