I'd it possible to have occasional PPD?

Some days I think I have PPD, and others I don't. Like some days I'm happy, and others I get so angry that I take it out on everyone but the baby. Then some days all I do is cry.

Almost every day though throughout the day I get random moments where I feel like I'm gonna cry, and the feeling lasts for a few seconds then goes away. Is it possible to have occasional depression?