Anorwalk, I know what you are going through!! I had and was diagnosed with the same problem and symptoms back 3 years ago. I couldn’t get any answers from my doctors, so I decided to see a specialist. I had this special MRI done on my brain. The next week I had surgery, I had 95% blockage in my brain. They removed part of the back of my scull for circulation. Two weeks after surgery had complications and contracted spinal menengitis, I was very sick, lost 30 pounds in 4 days and was in the hospital for 14. During my menengitis, The back of my head swelled severely and they thought they might have to go back in and remove the pressure. The specialist gave me some sort of antibiotics which brought the swelling down. After the surgery I still have periodic headaches, some short term memory loss, and comprehension which is all normal after surgery. So far I have been OK. I have a friend who had three surgeries from chiari, he went to the same doctor as I did. I do not mean to scare you, I am sorry if I am. If I were you get two opinions from doctors that know about it, and if they both agree, see what hey have to say! If it is bad take care of it right away!! You will be fine!! I was scared at first, but now I am glad I did it! Recovery takes time, but then it’s over! If you need to talk about this, I am here for you! I have been there!! I hope this information helps! Let me know, hope to hear from you soon!