My head fills so heavy!

So lately... ok everyday... I am having a Chiari headache. There are times that my head just fills so heavy and it is a struggle to hold it up ... it hurts just to hold it up ... My question is IS THIS NORMAL?? I am going Friday to have my mri CINE to find out if there is any blockage. My neck hurts constantly and I fill like if i could just leave my head down it might not hurt as much ... but we all know i cant live like that.

let me know if anyone knows anything that might help...