Such a case would have many challenges. Consult with experienced attorneys. The Avvo search tool https://www.avvo.com/find-a-lawyer

Consult with the law firms handling the Depo cases. Try an internet search for Depo-Provera lawyers.

Look for attorneys handling tobacco cases.

Has your doctor advised that the infection came from work? Consult with experienced workers compensation attorneys.

At this link you can find attorneys in the speciality you seek (ethics and professional responsibility) in your area: ...

Generally a POA is not necessary for most legal cases.

It is a possible case but may be difficult. Consult with experienced medical malpractice attorneys in your state.

What a horrible experience to go through. You may want to get some counseling to address this. As to the malpractice, that would have to be...

You might. Medical malpractice means that a doctor violated the standard of care. A bad outcome is not enough. Another doctor would be needed to...

You may be able to file a motion to set aside the judgment.