There are 2 issues here. The one is the potty training and the other is waking up at night.Has something happened which has upset her recently? If not you are going to simply have to go through the potty training exercise again with lots of patience and kindness to her. She should be using trainer nappies again until she starts to get things right.
The night waking is now a firmly entrenched habit and she wakes up to an audience of concerned parents every night which she is very used to now.She needs to be left for increasingly longer and longer periods to cry until she gets the message that you will not appear at her first little peep. She should also have a night light in her room.
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