Many folks here have gone for years with various things wrong and without a diagnosis. It's important though that first you find a doctor that you really do trust, and then tell him EVERYTHING that is going on, or has gone on (even if it isn't happening at the moment you're in his office.) Folks often will keep a diary, or log, of symptoms, noting if there is any kind relation between the symptom and something external, like "I really get weak when I'm overheated". And it's important to keep seeing the SAME doctor over time, so he can track when symptoms come up. Over time patterns can develop that can lead him to a diagnosis.
So if you haven't already, you might spend some time plotting when these things started to occur, and what symptoms you've experienced and when, and then share that with the doctor the next time you talk.
Unfortunately there are lots of things that could cause your symptoms, including MS, stroke, migraines, and a host of other things. The doctor has to rule out everything before settling on a diagnosis of MS, so it may be that you'll go through a series of tests, including the MRI, before he'll be able to tell you definitively what is going on.
I'm sorry this stuff is going on around the holiday. I hope you have some family or friends you can spend some time with, so you're not having to dwell on the uncertainty of this disease, or uncertainty of your diagnosis! Take care.
...I am not a doctor, nor health professional, and don't pretend to be one, here.....