Your symptoms are concerning and it cannot be neglected.
Please get a Doppler blood flow study of both the lower limbs
to check for the blood flow. There is a possibility of Deep Vein Thrombosis
If you are a smoker, then you must completely stop it.
You need to go on treatment for this condition if the cause is confirmed.
A low calcium level is another cause. Get your serum calcium level tested.
Hope this helps.