D.P.
T.,
First of all, know this: No O. on this site is going to tell you whether you have PPD or not. You need to discuss that topic with your doctor.
Also, you need to stop acting like "all is well" to others if it is not. There is no shame in having depression just like there is no shame in "having" cancer, or diabetes. What there IS shame in is ignoring it/not seeking treatment for the sake of appearance. No matter what anyone (including your husband) thinks. We all need help sometimes. Whatever form it may come in: a house cleaner, a nanny, medication, therapy, a babysitter occasionally, 30 minutes to read a book in peace and quiet...whatever! Ask for help if you need it.
That said, you have a LOT going on. And are unsure whether it's about to get more interesting......with a new baby.
No O. can do it all. I repeat: NO O. CAN DO IT ALL.
If you must work FT, then you are going to have to accept the fact that not everything is going to get done when you want it to get done. And that's OK.
As for the Christmastime breakdown, everyone was OK, right? Everyone was fed, healthy & safe. Let go of the Norman Rockwell images of everyone in their Sunday best gathered around an idyllic dinner table. Not gonna happen. Probably ever. At the end of the day if your kids are fed, cared for and safe...that's enough. It can be enough.
I remember feeling like I was NEVER able to get out of the house--and I only had O. child. It's normal. You received no help packing and just couldn't do it. No big deal. Life is hectic and nap skipping happens!
All I'm saying is don't hold yourself up to some mythological standard of a super human working über mom. They don't exist!
Best wishes!