LauraMax! You need to find someone with a belt to borrow and see how you do! I was skeptical when I first put one on that it was going to do anything, but it really does help you stabilize your core. When you have it on, you should push as hard as you can with your tummy against it, and you won't believe how stable you feel.
I've always been told that belts are only needed for 'maximal' lifts. The number they throw around in the power gyms is that if you can do more than five reps at a certain weight, then you realy don't need a belt. And then there are folks who say, as LauraMax mentioned, that if you are using the belts at much lower weights, you're probably doing yourself a disservice by not strengthening your core.
Katie