Hi there B.,
My daughter, Lily, will be four at the end of March. She's no longer having accidents in the daytime but she still wears a pull up at night. Up until just a few months ago, she continued to have daily accidents though. I'm sure your daughter isn't out of the norm. ;) Have you tried switching her back to pull ups in the day time? With Lily, we would put her in underwear in the morning after she went on the potty. Then, if she had an accident, we'd put her back into a pull up. The next time she made it to the potty, we'd put her back in underwear. It helped motivate her since she liked the big girl underwear.
The other thing we did that helped a lot was setting a timer. It's kind of obnoxious, I know, but it helped. So, I would set a timer for 20 minutes. When the timer went off, I'd ask her if she had to go. If she said no, I'd reset for another 20 minutes. After she said no three or four times, I would ask her just to try. We would sit on the potty and many times she would go. I found that she would get so involved in playing that she wouldn't want to stop to go. So, me asking her constantly helped her learn that whatever she was doing would still be there when she returned from the bathroom. :)
Do you have a potty chart? Nothing fancy I just wrote "Lily's Potty Chart" at the top of a page of construction paper. She got one sticker for pee and two for poop. Hee hee! She still likes to put stickers up even though she pretty much all trained! :)
I hope some of these ideas work for you! Good luck!
C.
www.EnhanceYourWayOfLife.com