Maybe. Only a proper assessment by a psychiatrist or a really good GP could clarify whether you may have developed a Depression, or whether maybe you are depressed about a depressing set of circumstances, which isn't quite the same thing.
Your boss's response is disappointing : it doesn't matter at all whether this other man at work is currently stressed or not, he is not entitled to abuse you and infect you with his stress, but must find other ways to deal with it.
It's hard to see how the miscarriage would have been your fault, especially after the trauma of a hijacking. Your husband, as you describe him, is also being pathetically unsupportive and unhelpful, and obviously should share the chores with you and attend to your feeling and concerns.
Too many foolish people encourage others to CONFRONT people with whom they have problems : you're right that this is usually seen as aggressive and can easily make things worse. That doesn't mean to ignore the problems, but to be assertive, not aggressive : to calmly but firmly raise the issues and ask hi to join you in finding solutions that would be good for both of you. If you can arrange it, it would be useful for you to see a counsellor to help you work out in more detail how best to deal with these problems and they could help clarify if you might already have depression : if so, using a CBT approach, they could help you to gain control of the depression, even without medication.
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