I owe my ex around $3,900 due in February 2017

Thank you for sharing hope it all works out with you and your lawyer.

Do i need a lawyer?

Unclear for what? No if you can handle any case in Court you are free to do so.

What charges can I file for a neighbor continuously verbally abusing my child?

Call 911 police and ask.......................................

Hi I'm on house arrest and the people who I am staying with.... It's just not working out I have a job at JM

Ok with me, but may not be ok with your p.o. or Judge. Best to call and ask.

Will I go to jail for leaving court ordered rehab but was picked up by another program from work?

No clue as none of us have your case or Court orders guessing yes??? Perhaps ask your Attorney or p.o?

Can I get out of court ordered rehab?

Sure ask your FREE or hired Criminal defense attorney alternative jail time may be your best option.

If a reserved issue comes to court for resolution, does the support go back to the original date of order or from the new.......

Since none of us have your case or the court order it is impossible to answer.

Yes she can sue you.....................................unlikely she will prevail. But anybody can sue for anything just got to prove it up.

The specific answer will come from asking your Attorney or the loan people none of us have your case.

Is there anything I can do?

Yes you can run not walk in consulting with a family lawyer in your area.