You probably didn't mean it in this way, but just to be clear, those irritations perhaps are not so small to your daughter. Her response may be proportional to the amount of discomfort she's experiencing.
The problem you describe also affects me. I think it's because i) my autistic brain craves order, routine and sameness but with other people in the house the environment is constantly changing and unexpected things are happening all the time; and ii) my autistic brain finds it difficult to process language - and living with others there always seems to be chatter going on. Spoken conversation can range from a little irritating to distressing and painful. If I'm well-rested and calm I can cope with it fairly well for a while. Or it can become very uncomfortable if I'm tired or I've experienced too much talking during the day. Or sometimes it can become almost like it's a physical pain, like someone jabbing a needle in my thoughts, and I snap and shout at people or run away from the situation because I need (not want) the talking to stop. I've worked with a few autism specialists this year to explore this and concluded that it's not something I have any control over directly - the only effective solution is to have lots of quiet time on my own and try to get out of situations as soon as I feel I'm becoming uncomfortable, before I snap - which is not easy because the time between noticing I've got a problem and it becoming unbearable is usually only a few minutes. With practice I am getting a bit better at it.