hang in there - youre doing a great job!
MantaRay has given you some great advice, but just wanted to say I hope things get better soon, no matter what you decide to do.


ETA - I just remembered that in another thread you mentioned you had recently separated from your DH. If you have been upset or stressed at all your DD will pick up on that - and will most likely be affecting her too. (I'm not trying to make you feel bad or anything - just wanted to give you another possible cause for her behaviour) Take it easy - and try to rest whenever she does