dd is 2.10 and is on day 5 of potty training. It's been going really well doing both wees and poos on the potty. However the last 2 days she's been holding it in for 8 hours at a time. She stands and crosses her legs and holds herself but she refuses to sit and do a wee. Eventually I coaxed her on to it and she produced a wee. We had a visitor yesterday so I put it down to feeling insecure about someone else being there. But today she's the same. Point blank refusing to sit on it even though she looks like she needs to go. Rewards aren't working, even chocolate, sticker charts etc. Where do I go from here?