In March we decided to give our 2yrs and 4month old DD a little push to potty train (said she had some new big girls pants to wear and she chose a potty etc.) and she was really into it. In a nutshell, she had no problem with peeing and telling us when she needed to go, but the poo was a different story, she seemed to be holding it in. On second day of wearing pants, she pooed in them and didn't let on, this was fine and we expected it. Then, she held in the poo until she could hold it no more and she stopped wanted to pee on potty for fear of the poo sneaking out. We really encouraged her in every way and told her we were there for her and she had to just let go of the poo. This did not end well, she pooed on the carpet a few times in one day and was really traumatised, running around in circles like a headless chicken, really distressed, it was so awful to watch. I was of the opinion that once you start, you do not go back to nappies, but by this point she would not go near the potty and would kick angrily away. I decided that if she wanted to, she could wear pull ups and just tell me when she wanted to use the potty. 2 months on, she has hardly ever asked to use the potty and when I encourage her to do so, she refuses.
My questions are: does anyone have any advice on what might make her want to use the potty or toilet again (we've used reward charts, chocolate, big big praise)? And has anyone been through this and how/when did the child decide to go back to pants and potty?