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Words or phrases should not be repeated within the space of a couple of lines (except for small common words like 'the') unless you are doing it for effect, for example: "No. No. No. A thousand times no." The difficulty is judging when it works and when it doesn't. One way to see is to read it out loud.
I don't honestly see a problem with the two later examples. You have repeated words ("mind" and "pissed off") because you're talking about the same things/emotions multiple times. The only problem with the birthday example is that nobody talks like that. If you wrote "You forgot my birthday!" I said. "I did not! I would never forget your birthday!" ...
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