I heard an American I met use this idiom "we were worked up on our rent". I thought she was saying that she got screwed on her rent. Did I get that right?

     I think

     a) She might had been worked up in anticipation on her rent.

     b) She might had been very angry or upset about her rent (then it might be because she regreted having acted emotionally before, not having read the fine print!)

      c) She got overly worried about a thing that wouldn´t deserve so much attention, her rent. Maybe she prioritized it over other things that could be more important.

      Once I got so worked up about flying, the day before the flight! when I got to the destination at last, I tought in retrospect and figured I should not.

    Anyway the event was affected by her emotion.  That is, it doesn´t necessarily means that she got screwed up in the process.

     It takes some context to know for certain.

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        Definition of WORKED UP
: emotionally aroused : excited

http://www.learnersdictionary.com/search/worked%20up
[more worked up; most worked up] informal : very angry, excited, or upset about something.

http://www.definition-of.net/worked+up
worked up , definition of worked up , meaning of worked up - 1 ( adj ) aroused, emotional, excited, worked up ( of persons ) excessively affected by emotion.

http://www.urbandictionary.com/define.php?term=worked%20up
"Justin was so worked up over his sisters friend he would feel sweaty and excited for her return"

"Gabe was all worked up in anticipation for the expected date with the model"

"Every night before bed he would get worked up over the blonde girls picture"

2.)
Waiting with excitement and Breathlessly Out of sorts;

Hormonly aware of titillating images;

Anxious and anticipatory for an outcome or answer.

Excessively affected by emotion

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  Some of the following examples are about ''dar importância ou atenção a algo demasiadamente/ exagerar (na dose)/ficar obcecado por algo..." 

http://articles.chicagotribune.com/2011-02-12/news/ct-met-homework-0213-20110212_1_homework-cathy-vatterott-harris-cooper
worked up over homework

http://www.theatlanticwire.com/global/2011/07/world-wonders-why-were-so-worked-over-casey-anthony/39711/
World Wonders Why We're So Worked Up Over Casey Anthony

http://www.hindustantimes.com/Nothing-gets-Rahman-worked-up/Article1-707089.aspx
‘Nothing gets Rahman worked up’

http://www.experienceproject.com/stories/Get-Too-Worked-Up-Sometimes/914006
Posted February 17th, 2010 at 10:23PM
I can definetly get worked up way past the point that i should be. my emotions overwhelm me.
I really wish i was stronger, cuz then i wouldn't get too worked up over hardly anything.

http://inspiredeating.com/intuitive_eating/all-worked-up-our-obsession-with-food/
     I wonder what would happen if we stopped being so worked up about food? What if we stripped our meals, our clothing size and the numbers on our bathroom scale of their supposed power to extend our lives, fix our problems, and make us thinner, happier or somehow better? I wonder if not getting worked up about food, and being more matter-of-fact about our meals, is one of the first steps on the way to eating intuitively.
      Loving and enjoying food, truly appreciating the seductive pleasure of a well-crafted meal, is a vital part of life. But when we start obsessing about it, giving it disproportionate power over our health and happiness, that’s when we disconnect.