Welcome to the forum, a place you never wanted to be welcome to!!
You’ve placed your post / questions at the end of a slightly different thread. Not a problem, but you’d get more relevant responses by starting a New Thread (there’s a button just above the list of current threads). You give your new thread a relevant title and then post your thoughts/questions etc.
Meanwhile, you should bear in mind that a physiotherapist is not qualified to diagnose MS (not that it can be done from a physical exam anyway), in fact, I doubt that a physio is really the right person to do a thorough neurological examination.
There are many diagnoses that share symptoms with MS. So dodgy reflexes, tremors and strength/weakness issues are not a specific marker for MS. The only way of diagnosing MS is by having an MRI - which you have lined up - of the brain and maybe cervical spine (possibly entire spine). Then by seeing a neurologist who will have the MRI and the radiologists report, be able to conduct a thorough examination, and order more tests as required.
Only when all the tests have been completed could a neurologist diagnose MS. Their starting point would of course not be to rule MS in or out, but to establish first whether their is in fact a neurological problem, then what that problem might be.
In some ways, I feel that this physiotherapist has done you a bit of a disservice by suggesting that you could have MS.