Hi Jan,
Interesting!!! And I am sure really confusing. I think I mentioned to you in one of your other posts that migraine could cause white blobs on MRI?
Well, some types of migraine can also cause symptoms very similar to MS or to a stroke as well.
I have MS and I also have a rare form of migraine called hemiplegic migraine. Complicates the Hell out of my life I can tell you 
Hemiplegic migraine is characterised by neurologic symptoms and sometimes the migraine sufferer doesn’t even get a headache!!! Though more often they do. The neurologic symptoms can range from numbness and weakness usually down one side through to complete paralysis of one side of the body.
Symptoms of hemiplegic migraine include:
· Severe, throbbing pain, often on one side of your head
· A pins-and-needles feeling, often moving from your hand up your arm
· Numbness on one side of your body, which can include your arm, leg, and/or one side of your face
· Weakness or paralysis on one side of your body
· Loss of balance and coordination
· Visual aura, such as seeing zigzag lines, double vision, or blind spots
· Language difficulties, such as mixing words or trouble remembering a word
· Slurred speech
· Dizziness or vertigo
· Nausea and vomiting
· Extreme sensitivity to light, sound, and smell
· Confusion
· Decreased consciousness or coma
With hemiplegic migraine, the aura can be more severe and last longer than with other types of migraine with aura. Symptoms usually last from five minutes to one hour. It’s rare, but some people gradually develop long-lasting difficulty with movement and coordination.
Usually the symptoms wear off after several hour to days but on occasions last longer. The main differences between MS and hemiplegic migraine are where in the brain the white blobs are found and their distribution. And also the neurological signs that the neuro finds on clinical exam will be different in MS. In hemiplegic migraine there will be as I said one sided weakness or paralysis during an attack but in MS there will often be changes to certain reflexes that won’t be there in migraine.
The on going nature of your pain could well be because you are having repeated attacks of migraine and are suffering horribly. I really, really hope for your sake it is hemiplegic migraine and not MS. There are super effective medicines that will treat this and you can get your life back on track. Whereas with MS as you know it tends to have a less rosy prognosis. Also with migraine stress and anxiety can definitely worsen and exacerbate the situation and worrying about having MS will be adding to the vicious cycle. You also mentioned not wanting got return to your job at the Nursery in another post.
Maybe this would be a good time to ask your GP for a referral to a good counsellor to help you learn some stress management techniques to assist controlling the migraines and to help you explore what you do want to do if not the Nursery work?
I am so glad it is looking less like MS. Now you need to ask your GP for a referral to neurologist who specialises in migraine management because hemiplegic migraine is a serious condition in its own right and needs carful and correct treatment.
Here are some other links for hemiplegic migraine
http://hemiplegicmigraine.org/
http://www.migrainetrust.org/factsheet-hemiplegic-migraine-10913
All the best and good luck,
Belinda