Absent some pretty limited circumstances, final property settlements are final. As you had an attorney it is unlikely you will be able to set aside...

Do I need to go through an attorney for my divorce

While you're not required to have an attorney, given the many issues you address you may wish to consult with an attorney to review the paperwork...

You can request protective orders from the court to protect you from him as part of the divorce process.

How much stay is required for a US citizen spouse at Bellingham WA to file annulment

If the marriage was here and both parties are living here you should be able to file in your county of residence

You will need to request within your divorce child support and spousal maintenance and request the same in temporary orders. You will likewise want...

Separated Money Question

That is a factor likely to be considered. It's based on her need and your ability to pay and you've demonstrated an ability to pay.

Most likely not .While he may get it reduced in the future it is unlikely he'll got what is owed reduced.