I think there may be a problem in your lower back. Have you ever got an MRI
of your lower back done? If not, you should get it done.
The leg pain, heaviness, stiffness
may be related to a problem in your back. We need to look for any degenerative lesions in the spine and the effects on the nerves there.
I wish you get well soon.
Please do this test and see if things get better for you.