You can file ethics complaint with the State Bar. Most State Bars have forms online.

There can be valid reasons to remove a client from an email chain. But a client is warranted in requesting copies of the emails.

The attorney may not charge for work not actually or impliedly authorized or that was required.

It is very common. Review the fee agreement to see if it is addressed. If you have concerns, discuss this with the attorney.

Hire a new lawyer and get your money back from the first. Consult with and hire another attorney before firing your current attorney.

Use the Avvo search tool to find an attorney. https://www.avvo.com/find-a-lawyer Note, not all valid cases can be brought due to technicalities...

You may need to hire another attorney. Consult with and hire another attorney before firing your current attorney.

Medical bills can be negotiated and a settlement does not have to be accepted. Confer with other attorneys. Consult with and hire another attorney...

Check the court case information-many courts have this available in their websites.

Yes you can sue her. She may or may not be collectible. You may be able to sue in NY or NH.