I think you've got your inner demons and you're trying to cope. It happens to the best of us. I think everyone acts this way at least once in their life, even those without MI. I'm not saying it's ok to treat people this way, but I'm saying that i think most people can empathize and realize that something is wrong, based on their personal experiences.

That said, why not open up to your husband and son about how you feel? They've likely had a similar experience, as I've said. If you feel you're insulting people etc, it's ok to talk to them and say that you're upset, even if you don't want to disclose full details. Communication helps and people can be very understanding if you open up.