Is it depression or just being exhausted?

Genuinely can't tell anymore. My 2yo doesn't sleep great, I've been going back to work after 4 months home, and everything feels gray. Not suicidal or anything like that, but I'm not excited about anything either. Wife suggested it might be postpartum depression (she says dads can get it too?) and now I'm wondering if I should talk to my doctor about it. But also maybe I'm just tired? Idk this feels dumb to complain about when my wife's home with the baby all day.