I can't stand my mom!?

I seriously now can't stand my mom. She's starting to be a serious B and is driving me to the edge. She's walking around the house, walking grumpily, with the grumpy/angry look on her face. Whenever i try to approach to her, she only gives me one word answers or none at all. Whenever we don't agree on something she will literally snap at me like a crocodile. Mom : ''Take a shower now (6.30 p.m)'' Me : ''Can I take it at 8?'' Mom : ''No, now...'' Me : ''Why can't--'' Mom : ''NO TAKE IT NOW!!! 8 IS TOO LATE FOR ME!!! (strange because she's not the one taking the shower nor going anywhere later on)'' So that is an example of what happened today and basically what happened everyday when she disagrees on something. This is really pissing me off because my mom isn't negiotating or thinking something besides what's she umes is ''right''. She a stay at home mom, and is driving me crazy. I have no one to talk about this since i am an only child, so please help me yahoo community