We've been putting my daughter, 2-and-a-half, on the potty for quite a while. She has never particularly liked it but agreed to sit there for a minute here or there - although never actually done anything... until a couple of days ago, when she announced she needed to go on the potty, and did a poo on it. We made a massive fuss of her, gave her a big reward etc but now she seems really resistant to going on the potty again - she starts crying every time we suggest it and just suddenly really isn't into it. What to do???