could it be postpartum depression?

I had a little breakdown on Friday night. I was horrible to Erik, yelling at him, and in his opinion a little scary. I do recognize that I'm under extreme amount of stress, because of all my obligations. I know that I really should of considered taking time off from school to adjust to going back to work. But, Erik would have none of that. I know he's right it would just delay my degree even more. I've been sick off and on throughout the beginning of this year. I've worn myself out the last 2 months almost. I have so many demands of school, work, keeping the house going (you know laundry, dishes, vacuuming and just in general picking up)
I know that Erik is trying to help and as we go we communicate more and more and some things have become a second nature and how to work on them or around them. I want to discuss my birth control options with my doctor and make sure to see in her opinion if I could have postpartum depression. I know Erik and I discussed it over the weekend. And he' thinks I do. I also think though part of the problem is the depo. It could be making my hormones worse. I know that I was very scared over the weekend. But, I realize that I have to go back to taken care myself too. Erik can help me out by watching Hayden while I take a shower, or workout or maybe just have sometime to myself. But, I just have to speak up. I think that's also part of my problem I don't activate what I need or want enough.
I believe I can figure things out. That's why I made my plans with my best friend Cynthia for us to have a girls night. And Erik will stay home with Erik. I need a night with my friends even if I have homework. I have to do stuff for myself sometimes. I'm going to see how that goes, make little changes everyday. And make a conscious effort to be nicer to Erik, even if I'm upset as hell with him. Because I can't treat him badly that gets me no where!