I have a daughter who will be three in a couple of months who was almost potty trained when she was right at 2 years old, but then suddendly starting wetting her pants and having "accidents", similar to what your daughter is doing. Here are my thoughts...Although you mentioned several times that your daughter was potty trained, she has never been potty trained at all. It sounds like it is absolutely a control issue with her, which was the case with my daughter and my oldest son, as well. With both, I finally reached a point at which I became so frustrated that I decided to not ever talk about going potty to them again. (That means not ever even asking if they need to go potty). I just pretty much acted as though I didn't care one way or the other if they went. With my daughter, I just kept putting her in panties and praising any successful trips to the potty. Very shortly after doing this with them both, they were 100% potty trained. It is so frustrating, though, when you know how intelligent they are, and there just seems to be nothing you can do. I do have to say the poopy part came second to peeing in the potty for both of them. I'm embarassed to say that towards the end with my daughter, I became so frustrated with her. She had gone to sit on the potty right at bed time, but then just wanted to sit and read...forever. Finally, around 9:45, I was so frustrated (and again I'm embarassed to say I did this) that I said, "That's okay. I guess you're just not big enough to go poopy in the potty. Let's just go to bed". Not even 1 minute later, she pooped, no problem! Little stinker! :-) That being said, I would toss the pull-ups all-together, unless she needs them overnight, in which case I would ONLY put them on her at bedtime...never when she requests them to go poopy. We have dealt with holding it in, too, and if your daughter goes that direction, I would suggest Miralax. Talk to you pediatrician first (if she starts holding it in). It's usually a lot less expensive with a prescription than in is over-the-counter, depending on your insurance, but if you get her on a schedule with this for a while, she will not be able to hold it in. It is safe and non-habit forming too, unlike a true laxative. Sorry this is so long, but stay strong, don't stress out about it, and good luck!!