Thank you for your reply.
I am due to see my GP on tuesday. I think that maybe the neck stiffness and sickness was a follow on from the Lumbar Puncture. Today had been a lot easier for me. I did suffer from Migraines years ago and sometimes they were severe and lasted a couple of days. However, like i said, this was very different. It lasted 5 minutes or so and came on in a second without any warning. I just have a gut feeling that something is wrong.
I will report back to base !!