Hi Anna!
Sorry you've got headaches, but apparently it is a possible byproduct of a spinal block.
I found this reference:
http://www.webmd.com/pain-management/pain-management-spinal-headachesIts main point is:
"A spinal headache can occur as a result of a procedure such as a spinal tap (lumbar puncture) or epidural block (such as that performed during a woman's labor and delivery). In these procedures, a needle is placed within the fluid-filled space surrounding the spinal cord. This creates a passage for the spinal fluid to leak out, changing the fluid pressure around the brain and spinal cord. If enough of the fluid leaks out, a spinal headache may develop.
Because the design of spinal needles has been improved, spinal headaches after a spinal tap or administration of spinal anesthesia are rare. When epidural anesthetics are placed with a larger needle than that used for spinal anesthetics, however, the likelihood of headache is higher if the epidural needle should inadvertently pass through the dura matter (covering of the spinal cord)."
It usually lasts about five days from the onset.
The suggested ways of treating them is hydration, since the cause is a difference in pressure in your brain due to loss of some fluid. So they suggest:
"The first course of treatment for spinal headaches involves supplying adequate hydration to try to increase cerebral spinal fluid (CSF) pressure. Sometimes intravenous fluids (fluids administered into the veins) are given; other times the person is advised to drink a beverage high in caffeine. Strict bed rest for 24-48 hours may be recommended."
The best thing to do might be to call the surgeon's office and ask what they suggest. At the least, load up on fluids and see how that goes.
Good luck Anna... how's the hip?