Many doctors worry about a misdiagnosis- especially in the litigious society we now inhabit. I just read about a woman who has had MS for 40 years, but she did not get her diagnosis until she turned 70 years old. Although you might think "MS", a neurologist has to think "MS or ???". Symptoms of MS can also present with other diseases.
I was diagnosed in 1982. From the time I presented with my symptoms until diagnosis was 2 months. I was lucky that the chief neurologist was my doctor and he ran the gauntlet of tests in 3 days. I even had an early MRI. (LOL, the MRI then was like the invented wheel, but I am glad I was a test case!). I had my diagnosis on the third day.
Sooooo, you can see a wide difference in time to diagnosis. In fact, in hindsight, my symptoms started when I was 14. I had lived with it for 5 years without knowing. The Lord used a 2 X 8 to get my attention in 1982 because the 2 X 4 in 1977 failed to get my attention.
The good news is that MS diagnosis nowadays is lightyears beyond where it was. (insert 5 foot snow drifts uphill both ways.....

) Well, any way, stay proactive and run the tests. Your neurologist will get to a diagnosis. You want to be sure of your diagnosis before you start any meds. I have not used meds for 30 years (26 since my diagnosis).