Can my government employer threaten disciplinary action if I cannot work over time due to a scheduled doctors appointment?

It depends on a number of factors; there are laws that can sometimes preclude the employer from mandating OT in such circumstances. You should...

What do I do

It sounds like there are valid wage and hour claims. You should review your claim with an attorney.

Can i get back pay for taking care of my mother for 2 1/2 years like shes trying to get me for back pay for rent

It sounds like you need to retain counsel.

How do I file a harresment complaint against my employer in the state of washington?

Talk to an employment law attorney as soon as possible to review options.

Workplace harassment by VP?

You will be able to find an attorney to pursue this case on a contingent basis, but don't wait around--time limits can affect rights.

I'm worried I will face pregnancy discrimination when I announce pregnancy to my boss. What can I do?

The FMLA isn't the only basis for a possible claim. Consult with an experienced labor and employment law attorney.

Any recourse on a wrongful demotion?

From my perspective, this warrants a full legal review.

The employer can designate that FMLA and vacation run concurrently, but only if the time off at issue was for an FMLA-qualifying reason.

Can i still sue for discrimination if i was given a different reason for termination?

Yes. Each "adverse employment action" is viewed independently when assessing whether there was unlawful discrimination.

My boss strung up noose and shook it at me while yelling my name. I was later wrongfully terminated for vandalism.

I'm not sure if you have a question, but it sounds like you have possible claims.