There isn't sufficient information to reach a specific diagnosis. I would advise you to meet an orthopedician so that you can be examined and undergo investigations such as CT/MRI, EEG(if indicated),
thyroid profile,
Vitamin B12, etc to find the underlying cause and have it treated accordingly. Kindly refrain from carrying any heavy objects during this time.
Next Steps
Follow the steps as advised
Health Tips
If condition persists or worsens visit the orthopedician at the earliest