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Good evening, I am Dr Ruff, thank you for contacting us today
I am sorry to hear this. How long have you had this? And which muscles are the spasms happening in?
Okay thanks. As per the knee stiffness, if this is only over a day and a half, this is likely muscular in cause. Knee stiffness is not neurological, it implies inflammation.
I wouldn't worry about this, take some ibuprofen and do some leg stretches.
This can be from muscle fatigue. As it has only been 1-2 days I would see how it goes. You have an MRI planned in case you are concerned about something neurological, but I wouldn't suggest that is indicated for these particular symptoms at this point, but if you already have it arranged then may still be useful to reassure you.