Don't cross bridges until you come to them. 30 years ago, a neurologist told me I had MS and he wanted to do a spinal tap to confirm it. I went to my family doctor, he told me the neurologist was new to the area and he was telling all my family doctor's patients that they had MS. I went to another one, my family doctor recommended a neurologist from Stanford University. Despite the myriad of symptoms, and I had some weird stuff, he said there was no evidence of MS, and before I moved out of the area, I had my first MRI, which was negative.
From a website I found this:Hemiplegic migraine is referred to as a “migraine variant”. The word hemiplegic simply means paralysis on one side of the body. A person with hemiplegic migraine will experience a temporary weakness on one side of their body as part of their migraine attack. This can involve the face, arm or leg and be accompanied by numbness, or pins and needles. The person may experience speech difficulties, vision problems or confusion. This can be a frightening experience for the individual as these symptoms are similar to those of a stroke. This weakness may last from one hour to several days, but usually it goes within 24 hours. The head pain associated with migraine typically follows the weakness, but the headache may precede it or be absentwww.migrainetrust.org/factsheet-hemiplegic-migraine-10913
I think your Neurologist is doing the right thing, but there is no need to panic. Many tests are done to rule-out more serious problems.