You need an MRI. To diagnose MS, you need an MRI with lesions showing consistent with MS. (other things can cause lesions)

You need symptoms separated by time and space (you have had that)

You need tests to rule out other causes (B12 deficiency, Lyme's etc.)

Sometimes they will do a spinal tap to check for proteins in the spinal fluid.

Evoked potentials may be done also to see how you stack up.

I think its HORRIBLE that your doc did not let you see a Neuro. You may need another doc! MS needs immediate intervention and you are not getting any facts from your doc. Stress is not a diagnosis in a "healthy" young person.

Perhaps you do not have MS......but I read nothing in your post that proved that. They need to seriously look for MS and things that mimic MS.