What Causes Frequent Headaches With Normal MRI And Blood Work?

Hi I am having frequent severe headaches which resulted in a hospital admission in sept, which ruled out a bleed and meningitis, the headaches are getting more severe and and more frequent. I have had lots of medication now I have a nasal spray of triptan ???poss cluster headaches, I am under the ophthalmic dr for poss myokeamia, he has now requested a lumbar puncture, MRI, eye monitor and referral to neurologist as my mum and 2 cousins have MS. But since wed the headaches are now coming with tingling down my right arm, the headaches are always to my right. I have taken the max spray and now I have woken with another headache. I was told by gp on Friday to go A&E if it doesn t work but I was kept in last time and only given paracetamol which didn t help and I was crying in bed so I am scared to go