Hi Lisa,
I love nurses, they are so caring and sometimes I feel they are better than doctors, so kudos to you and your profession. As for your question, just eat healthy especially if you are on a 1200 calorie diet. Most people will lose weight on a 1200 calorie diet just make sure you don't go lower than that because it might trigger your body's starvation response and it might work against you.
The list of foods to eat are just too long to write but I will give you general categories. The best foods to eat are lean cuts of protein, whole grains, healthy fats such as avacado, cashews and fish. You want foods packaged by mother nature which means that they have not been tampered with too much by manufacturing.
Click here to use the calorie calculator to estimate the number of daily calories your body needs to lose weight
The foods you want to avoid are sugar and fat combined such as donuts, pastries and alcohol such as beer
Kenn Kihiu
http://www.dancexfitness.com
danceX - fun, fat burning dance exercise