what is your question?
This can be from many problems.
Where is your pain?
The situation sounds neurological, but if you have pain in the joints extensively, this can also be the reason, due to faulty proprioception.
In any case, you need an exam and weakness would indicate a possible emergency.
If you can not see your doctor right now, go to the ER.
Weakness is never normal. If this is a spinal problem, possibly needs immediate intervention.
Brain disease, muscle disease, and spinal disease all need to be considered.
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