All of these recommendations are great. I find that I'm cranky too. Last night we had to pay bills and my husband was very kind while I was just impossible. Then I went to sleep. I'm sure he said "Phwew." Today is better.
Tomorrow will be better for you too. I would definitely let the family know that you will be taking time for yourself. What if you started watching Sex and the City? If you came home and watched one episode each evening before you join in...