What can I do?

What kind of social media post was this? You can report abuse if on Facebook.

I was accused of shoplifting at Wal Mart and was told I would be sent a letter and would have to pay Wal Mart a large sum?

As Attorney Lassen posted, most lawyers advise against paying the civil demand letters.

Can a doctor's prescription be legally issued if it based on questions and answers about medical history online?

Look for a business attorney in your area.

You should discuss with your workers comp attorney.

Any Malpractice lawyers in Fairfax County, VA who'll take case on contingency?

Use the Avvo finder tab for your area to find an attorney.

Will my husband and I get sued if my mother gets into a car accident?

Probably better for her to be on her own policy, but I don't see how you can be sued just because she lives with you.

Will my husband and I be sued if my mother gets in a car accident?

Talk to your insurance agent about getting an umbrella policy.

As my colleagues posted, it would be best to consult with an employment attorney.

Can I sue my insurance company for damages such as emotional stress, putting me and my family at risk, violating my privacy, etc

You need to review the policy and consult with an attorney.

What do I do? Do I have a medical malpractice case?

You should discuss this with your workers comp lawyer.