What Causes Extreme Headache With All Tests Being Normal?

Hi there, I had bad headaches so was admitted to
Hospital, ct scan showed nothing, MRI showed nothing, lumber puncture was done and made me so much worse, suspected csf leak...but no signs of brain bleed or meningitis. Then let me go home after a few days. 2/3 weeks on I still have a bad head, stiff neck and I'm very tired, spin sore. I'm worried that something is wrong and they have not resolved it. Was also treated for sinitus as sinuses are sore inflamed and fluid coming from nose, crusty eyes. Please advise me on best course of action, I have been referred to neurology but that not until march! Thank you. Nina