Sounds very normal to me!!! I don't know if there is much you can do about it but change the way you deal with it / think about it. I know the last year before my daughter started school was very trying, she was so ready and I wasn't up to stimulating her as much as I could as I was so exhausted! It is hard work.

Two books which will give you plenty of great ideas:

The Science of Parenting by Margot Sunderland
Toddler Tactics by Pinky McKay

Can you also try extra care for her so you can have a rest and get less frustrated? Occasional care or something like that? Or take her to a play centre once a week and let her run riot while you have a cuppa?