Hi, I went through about the same thing with my daughter MaKayla. She has a rare blood disease, Histiocytosis. She did six months of chemo and has behavior problems. We were trying to get her into headstart at the age of three. I started potty training when she was 2 1/2. She would go #1 but hide behind the couch for #2. Then we told her she would get to go to school if she was a big girl and went to the potty. She was potty trained by age 3. But she didn't get to go to school, due to over crowding. I believe she felt betrayed and started to retaliate. She would stand in front of me and say I'm peeing. She would go outside and do #2. I went back to pull ups. Then I took her to the store and let her pick out her own panties. She got Dora the Explorer. I explained that Dora didn't want to get wet or nasty. She was using the potty in about two weeks. This was two weeks before her 4th birthday. You haven't done anything wrong. I believe toddlers learn at there own pace and my daughter was teaching me a lesson. (Don't say if you do this - you will get to do this, unless you know it is true). Remember no pressure, there is no time limit.