That sounds like me. I tend to get really defensive about my personal live in general. I tend to treat every situation and even people like a business contract.
Somebody at work, just after I posted this, mentioned that I have really been overdoing the coffee the last couple of days. I used to drink about 7 cups a day, but starting my new job I did not have time and only drank one in the morning and two in the evenings. The last week I am drinking about a cup an hour. And I actually feel like my old self again. This made me wonder if the coffee was repressing the depression and when I stopped I had a full blown melt down? I started the job in March and was at my absolute worse during June & July starting to feel better during August which is also about the time I took up my coffee again. But I am not even sure there is a relationship between the two.