Barb,

Robin Murphy talks about this kind of headache after a spinal tap. I think even if it were an epidural, it's having the same effect; plus we've got a puncture wound, an injury to the spine--it's enough right there to consider Hypericum, but there's a rubric:
Headaches: Spinal, spinal injections, after-Hyp(3)
it's the only remedy. So, I would give this poor woman Hypericum as soon as possible!

Snoopy