Can I get full custody?

You have not described anything that would absolutely guarantee any change in possession orders. You are divorced now. You are both free to marry without 'reporting' to the other parent.

Take your orders to family law counsel regarding the desirability of returning to court. Texas has no status called full custody. If you have the right to designate your children's residence you have the custodial right in your present order. He is not required to tell you anything about his new wife. From objective information from your children and what you can glean from others, you must determine if they are at any risk or danger from that person and decide whether to file to modify orders. You can obtain her name and date of birth and you can do some independent background check on her. He also is not required to respond to text messages, but perhaps this has some innocent explanation. Talk long and hard with counsel before deciding whether to go back to court. Yes, you can have something good happen or bad.

It is imperative that the attorney knows the reason why he has primary custody and the type of custody that is Sole or Joint. It is always difficult for a female to lose primary custody. If there is a material reasons than the attorney needs to know if the circumstances have changed since the divorce. At that time you can decide to fight for custody.