I switched the practice area of your question to immigration law so you can get the best response possible.

You can file for contempt. You can demand whatever you like, whether or not the police and/or court accepts your demands is a different story.

If he is timely paying you may have difficulties getting OCSE involved. otherwise you can file a petition for contempt and/or a motion to modify...

Depends on the exactly language in the agreement and what good faith efforts you two had to discuss these changes. You can either have the ability...

If there is no court order then the easy solution is do not let him in the house. If there is a court order then you have the first solution as...

The court will set in a hearing about 45-60 days after you filed the request and if the other side does file an answer and/or show up at said...

Unless the place that you are residing in has an occupancy limitation, and so long as each child has their own bed, no.

child support cannot be filed until after the child is born.

you need to prove that there has been a material change of circumstance that makes the current arrangement no longer in the child's best interest.

Don’t believe there is an exact amount and it is discretionary. I have seen as low as $5,000 before.