god, I know the feeling you're talking about. It's terrible, isn't it? every bloody thing makes you just want to scream at the top of your lungs. EVERYthing is frustrating, little tasks seem impossible, the world seems like it's against you...its terrible.
unfortunately, when I'm going through that, I don't get much sympathy, because the people around me already
think I'm psycho. So I don't think they notice that I feel even worse than normal...lately I've been feeling pretty much depressed and pms-y all the time, that's just when it gets worse. anyways, sorry.
My suggestion is, if you even so much as feel any frustration coming on, quietly remove yourself from the company of others. Read a good book, take a nice bath, spend some time with yourself. The frustration won't go away, but you're less likely to annoy yourself than other people are. If there is someone important, like a boyfriend, who you do want around because he can sit there with you and try to help you feel better, let him know how you're feeling and ask if he could be with you. If it still seems like everyone one and everything in the world is out to get you, put on some loud music and do mad dancing around your room!
hope you feel better soon, hon.