I have had a similar experience about 8 weeks after my third son was born. Mine ended up being diagnosed as migraine also and now I take preventative medication daily otherwise end up with migraines twice a month. I had the headache after my lumbar puncture too and was told to just wait it out. Took about 5 days I think. Try to lie down and get the kids to come to you and get someone to deliver family movies and catch up on some quiet time. Hope your feeling better soon.