post partum depression?

Dev
My son is two. Is it possible that I'm just now developing PPD? Most of the time I'm happy and loving life with my toddler but here too often when I get a little overwhelmed I find myself hating my life. It's only momentarily but in those moments I genuinely hate my life and think about how much easier it use to be. I get over it within minutes then feel insanely guilty for feeling that way but it still happena over and over. I love my baby with all of my heart. My mood has just been all over the place lately. I'm also on the pill and though maybe that could be the culprit..?
I also have exteme separation anxiety to my little guy. I've always hated leaving him for work, etc. but lately it just kills me leaving him while I work to the point where I want to cry.