strizzlow20, I have had 2 LP's and in MY experience it was the worst test. After both my LPs, I developed the spinal headache and on the 2nd LP I actually had to go back to the hospital and have a blood patch done to close the leak from the LP. Now, thats just MY experience, many have had it done and it was no big deal. I believe its totally an individual experience. I hope yours goes smoothly and no headache!! My LP was the last straw that got my dx.