Don't feel bad! Mine did much the same, but something to remember is that most children are not DEVELOPMENTALLY ready to really potty train until closer to 3. Some are ready sooner, or a little later, but most child development experts agree that 3 is the average. Maybe it's a little too soon for her?
I know it's frustrating - we tried with my daughter around the same time and she just couldn't really get it. She was on OUR schedule for potty, not her own. Finally, we decided to wait (on the advice of a pediatrician and after much reading) and when she was closer to 3, she suddenly just got it. We had accidents, sure, but she seemed to be able to recognize when she needed to go. It was much easier and less frustrating for all of us, and really only took a few days before she had it down. She was much less stressed and so was I!
She also started PreK in the mornings and saw other kids going potty. That helped, too. When she did start, we also gave her one or two M&Ms for going. After a short time, we just phased the candy out, no problem. Worked like a charm b/c she was ready and old enough to get it.
I recommend two books that really helped me - Toddler 411 (a fabulous book w/ all kinds of info from a pediatrician we have used and used)and Potty Training Sucks (a funny and practical look at methods of potty training). Also Potty Time with Bear and the Elmo potty movie are great ways to get her interested and learning.
Just remember - she'll be ready eventually. She's not going to go to Kinder in her pull-ups! :)
Take a deep breath and good luck!