I received a Default Judgment letter?

Hello friends,

I'm a bit in a weird spot and can't sleep. Hope someone here can assist me with my query. In 2009, Citibank charged off my account; that debt has since been passed around to a few firms. Here is the letter I received from my county justice court in Texas:

"ON THIS DATE, Plaintiff, Citibank, N.A.'s ("Plaintiff") Motion for Default Judgment against Defendant(s) [my full name] ("Defendant") was considered by the Court. After reviewing Plaintiff's Motion and the pleadings in the Court's file, the Court is of the opinion that Plaintiff's Motion is well-made and should be GRANTED.

It is therefore ORDERED that a default judgment be entered against Defendant and that Plaintiff is entitled to recover from the Defendant:

1. Judgment in the amount of $xxxx.xx as actual damages for breach of contract;
2. All costs of court; and
3. Post-Judgment interest at the lawful rate of 5.00 percent per annum from the date of Judgment until the Judgment is satisfied.

It is further ORDERED that all writs and process shall be issues without further Order of the Court.
It is further ORDERED that this Order disposes of all parties and all claims in this cause of action. It is therefore FINAL and appealable. All relief not expressly granted by this order is denied.

SIGNED this __ day of _______, ____."

I have a few questions:

1. Does this mean I got sued/served?
2. Can the original creditor come back out of no where and sue me even after passing my debt to another firm?
3. What is my next best course of action.

If it helps, I'm paying for Lexington Law to work on my credit repair. I wonder if them sending Citibank letters prompted this action. I would appreciate any advice the members of this community can assist me with. Thank you, everyone. God bless.