You poor thing. It's horrible isn't it hun. I think what's happened here is that they've come in quick succession. It's not very bloody nice when you get the odd one here and there (and when I do - it makes me shake, so I can relate to 'the anxiety that makes me ill' comment!) but you've had several all at once. It's stressful, hard to deal with, and you're only human! It's bound to happen.
There are circumstances that sometimes reveal itself in this job that lets you know how totally vulnerable we are hey. I've got a good friend in the industry and she tells me this when I have to phone her for support when I get a dodgy one, or a few in a row and I can't cope. And she's right!
But honestly, please make a deal with yourself, for yourself. Don't reply to them. You've got to stop doing that for yourself. Nothing good will come of it. There's never any way you can control other peoples behavior. The only thing you have control over is how YOU respond. That's about all you can control, and ever will be able to. Do yourself a favour, block them, call upon your support systems (friends, forums in the industry that will understand) and vent it out. Then move on from the shitty day. Sometimes I phone my friend in tears and wonder if I can carry on when I get the morons that come in doubles, threes, sometimes fours.. etc.. but you have to block them and put them out of your mind for your own sanity. Responding to them, you give them your energy and time, and you can't get that back!
Hope your week gets better hun, so sorry you've had a shit day. It'll get better! xx