welcome, Silly Girl and Guidingstar.
I think you'll find this place to offer a lot of support! I know a little bit of how you feel. I was very heavy as a teen and lost a lot late in high school. Then I went to college, got married, had babies, and gained with all of it. Frustrating. Slowly going down though. I'm looking forward to being in good shape again.
Can I suggest that one of your first steps is to write down every single bite that you put in your mouth? I found that writing everything down was a HUGE wake-up call for me. I had no idea how much I was really eating! I use http://www.fitday.com/
's free online program, and I've seen http://www.calorieking.com/
posted here as well. I've used that site a little for the nutritional information. It really does help to write down what you eat, and it's nice to chart your progess too, so you can see how far you've really come.