What should I do? Would this be a civil suit case against my previous employer

Speak to a workers compensation attorney right away and let them fight for your right to compensation.

Should I file taxes as "single" or "married but filing separately".?

Your tax status is what it is as of the end of the year. For you, only Married filing joint or separate.

Can I still be sued if I no longer have this unit?

As long as you were an owner during the time for which the lawsuit is being filed, you may be liable.

IF the critical issues of the case have been decided, then there is a final order and an appeal can be filed. If these are just peripheral issues...

Generally, an employer cannot reduce a person's pay due to an accommodation under the Americans With Disabilities Act.

Is there anything from a personal Injury standpoint that i can do? and if so, and you know all about it.. are you for hire?

Speak to a local attorney who specializes in products liability cases.

Nervous

You already state that you are hiring an attorney. Why don't you ask your attorney this question. That is what you are paying for.

Your fact pattern is a little unclear as is your question. Please repost with more information.

Can you help me correct this illegal taking?

Attorneys cannot solicit business through Avvo. Search for an eminent domain attorney on Avvo and reach out to them for help.

Can I sue my Dr for any negligence or pain and suffering?

Probably not. However, if your doctor won't remove it, and you want it removed, go see another doctor.