Hi. I do think that I suffered from PPD from 2 months to about 4 months. I was emotional and easily overwhelmed, despite support and help. While I was going through it, I really just that I was going through an adjustment, but in retrospect realize that it was probably a bit more. I thought about talking to my OB, but felt (inappropriately) silly and embarrassed, because she is a friend/colleague and we always had very quick to-the-point visits where she relied on my own medical knowledge and would just ask "is everything okay?." instead of delving more into things. What I really wanted to say is "no, I think something is wrong." I regret now not getting treatment, because I think thinigs would have gotten better quicker if I had done so. My husband and family were incredibly supportive and helped me get through it.
The funny thing is that before delivery I was very worried that I'd have PPD and tried to watch out for it ... but I think that it can be insidious and sneak up on you which may make it hard to recognize. Not sure.