Vibration feeling in head

Hi, I have been experiencing migraines for 16 years. (Ever since the birth of my daughter) I take Relpax which helps a great deal as long as I take it at the onset of a migraine. Well I started getting a migraine at work the other day and did not have my medication with me. I waited, hoping it would go away. Of course it did not. I left work and went home and took my meds. Well I guess it wasn't soon enough after the onset and I got a horrible horrible migraine. The worst ever. I slept for three hours. It was finally gone when I woke up. (I get them for three days and since it was my third day, that was another reason why I thought it would just go away at work) My question is......2 days after my migrane I started getting, every now and then, a small vibration feeling in my head that lasted like a split second. It happened like 3 times on day. And once so far today but todays seems to last a good second. Anyone ever experience this? Should I be concerned? Thank you in advance for your opinions.

Remember to stay hydrated, drink a Vita Coco instead of Gatorade is much better when it comes to taste and amount of electrolytes. That always helps my headaches.