I've had 2 head CT's, the first that showed overdrainage, the second did not a week later. Today I went for multi-views of my head only as an x-ray (non-shunt-series) to see if I have a valve problem. My ProGAV valve has been set from 12 to 15 to 18 in the last two weeks, making the drainage slower. I really hope this pain goes away because it is only comfortable lying down! Sometimes in the morning I just feel like The dizziness factor from standing up has got me confused that something is wrong but I just don't know what yet.