Headaches and more

So I've been suffering with terrible headaches for awhile now and with all the tests that I've had to do I'd hoped they would find something but so far nothing. Yesterday I had a spinal tap, another test in the long list of tests, today I'm feeling like someone is pounding on my head. I was alright to come home but after a few hours of laying down, which I was told to do, I can't sit or stand up without intense pain in my head. I have to be practically flat to not feel it. Hope this test will finally tell the Dr. something useful.