assuming you are in UK…
The neurology team will discuss you at their multidisciplinary meeting (regular monthly meeting), to look at your results and decide what has caused your symptoms and what treatment they will offer going forward.
You may not hear for weeks, but every hospital is different.
Was your MRI just of your brain? If so, you will most likely be offered a full brain and spine MRI, possibly with contrast, so they can get a better idea of what’s going on. Maybe other tests will be necessary.
If they do diagnose MS you will be assigned an MS nurse and possibly start a DMD (disease modifying drug).
Try not to panic. It does seem a long time when you’re waiting for answers - you’ve entered the scary land of Limbo. But you’re not alone, we’ve all been there and we all visit often!
Like you, I was also dx with a TIA first, in 2014. I was 56. Then in June 2015 dx was changed to RRMS following admittance to A&E with new symptoms.
You can prepare for your next appointment by keeping a detailed record of any/all symptoms - when they started, severity, duration, what you were doing before they started, etc.
There is a lot of excellent advice and information on this forum but until you have a definate dx don’t get too entrenched, there’re a lot of other possible causes for your symptoms.
Final bit of advice is stay off Google - that way madness lies.