I do not see a question here but you would be wise to consult with a local bankruptcy attorney.

You can and should contact the police.

Lawsuit against who? Your post is unclear.

No. While clearly improper, you lack sufficient damages to warrant any legal action.

Your injuries do not warrant the enormous investment of time and money for legal action in my opinion.

Rude and unprofessional but not legally actionable.

Turn this over to your car insurance company immediately and they will provide a defense. This is exactly why you have insurance.

Your suspicions aside, you have not alleged having sustained any injuries.

I agree with Mr. Hoffman. You need to get an attorney licensed in the jurisdiction where the collision occurred.

Not unless the delay in treatment caused significant worsening of your condition. Merely being told that they ought to have taken you to the ER is...