Beansbeans, just a quick point from me, as I find parenting a 7 year old pretty challenging at times too.

You mention she's started kindy this year. Well, we're in Yr 2 now, and I notice towards the end of term and particularly towards the end of the year, DD1 is starting to wear out and act up more (kindy was the worst as the attitude combined with the tiredness - mentally and emotionally, not just physically - really came through!). It's been a long year, with a lot of challenges and adjustments. No matter how well they seem to cope, they are more than ready for a holiday by the end of the year. I wouldn't be surprised if you've noticed an upswing in the bad behaviour this term. For us, it did get better, year to year, but the last few weeks of term 4 are usually DD1's worst.

Go easy on yourself, you probably need a break and so does she! Unfortunately, the lead up to Xmas makes things even busier and the down time can't come soon enough.