I feel terrible writing this, but for the second time today, I've been close to tears over DD's behaviour (and I don't cry easily at all). I just need some advice on where we might be going wrong or how we can manage things better.
I'm not sure where to start, but probably, the background: DD1 co-slept with us until I went back to work when she was 9 months. However, the constant getting up in the night to settle her (and over an hour settling her to sleep at bedtime) took it's toll and I moved into the spare room so DP could co-sleep with her on worknights. We tried putting her bed in our room but that made no difference, we bought her a Peppa ready bed to sleep on the floor next to us, but again no better, we tried different bedtimes and routines and still nothing. Then DD2 arrived in August and it became impossible to have both of them in bed with us, especially as they kept disturbing each other. So now, DP goes into DD1 when she wakes up and sleeps in her bed with her (can be anything from midnight to 5am when this happens). We really didn't want her to feel pushed out by the new baby but this was unavoidable.
She also nappy trained over the summer and was doing really well, but recently, she has regressed occasionally - she'll have lots of dry days and then days where she just wets herself and doesn't even say anything until she asks to take her trousers off and we discover they're wet or a puddle somewhere. I don't chastise her for wetting herself as I want her to understand that accidents happen and that it's not wrong. She used to get really upset if she had one, but now it seems she does it to annoy us when she doesn't get her own way. Today she's been through 3 pairs of trousers for example. We do not want to go back to nappies as I threatened that at the start of this behaviour and she said she'd like that. A lot of her behaviour is almost trying to be a baby again (I assume in response to new baby) - e.g. feed me like a baby at every meal, baby talk, asking to wear nappies, and go in pushchair, etc.
She throws tantrums over everything - we'll tell her she can watch one more episode of Peppa Pig and then turn it off, but then she has a meltdown when we do this, if we offer her a banana instead of crisps/chocolate/cake she has a meltdown, ask her not to jump on us/DD2/sofa/bed, she has a meltdown, ad infinitum. I've been trying to manage these as distress tantrums rather than Little Neros but now I think I've been too soft. Giving her time out just escalates the tantrum so doesn't work either.
Despite the lack of sleep, I take her to a baby/toddler group or softplay every day to give her some time to let off steam (and us some time off from the constant whinging and needing us to play with her/read to her, etc). But DP thinks we're spoiling her by going out of our way to ensure she gets out every day to something for her. But at weekends, if we don't go out, we just seem to spend all day, every day screaming at each other. Just now I saw her pick something off the floor and put it in her mouth so asked her what it was, she ignored me and ignored me - even when I got to the point of shouting the question right into her ear. It's just a constant battle of wills and I can't take much more of the shouting, crying, screaming and no no no's.
What can we do? I love her so much and when she's great she's incredible but I feel like I'm failing her terribly at the moment.