i did have sx's but didn't recognize it.
when i got dx'd with MS i then could think back and see that it could have been the MS. my neuro said i'd probably had it for some time (about 5-10 yrs).

i was very heat intolerant.
i tired easily.
my legs were getting weaker.

but i was an RN working long days and walking a lot so i just thought it was my work, and my weight.

silly me.
give it a bit more time.
surely you will see this dr again. get him to pin down this lesion thing.
was your neuro exam normal or abnormal?

your next appt you might think about bringing a trusted friend and/or family member. they can be a 2nd set of ears for you.

and, write down Q's you think of.
i hope you find answers soon.