One more thing...you need to get angry at your lawyer and state firmly to him what you are expecting from him. Emails and texts aren't conveying that. In his eyes, you most likely look like a pushover and will do whatever he wants you to do.
Call him up and give him the what for about your child support situation and tell him you want answers. That the sooner you get the back payments and are on a regular schedule to receive the support payments, the sooner he'll see another check.
You have to toughen up and start being tougher instead of a little mouse accepting whatever crumbs this lawyer is tossing your way. He works for you, not the other way around.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.