Hello and thank you for your question.
The white dots of MRI you are mentioning is likely due to the fact that you have the history of migraines. In order to diagnose and confirm MS you need to active and passive lesions ie old and new lesions and also you need MRI with contrast that can enhance the lesions.
So it is unlikely related to MS and can be due to anxiety and migraines.
Moreover in MS most common symptoms is otic neuritis which is inflammation of the optic nerve which is treated by steroids.
You would also experience confusion and slurring of speech too.
You are always entitled to get second opinion and getting MRI with contrast of brain and full spineis the best way to diagnose MS.
Please let me know if you have any further questions. Thank you.