Migraines and cluster headaches

The worst headache I ever had was right after I had 2 discs in my neck removed and replaced with donor bone. it was explained to me that the loss of ceribrial fluid lets the brain sink, thus the headache. Mine lasted 3&1/2 days.
Could it be that an increase in ceribrial fluid pressure would do the same ?
A shrinking spinal column could inrease the fluid pressure.