Does ketosis or PSMF cause depression?

Birthday Party...
     Today was my baby's first birthday party... my little men are getting so big! :o(  This was also a little sad because it was the typical birthday party: cake, pizza, and more cake. And of course the beer and wine I couldn't drink to soften the blow...
     I picked up the cake, then went straight to pick up the pizza....one may argue that those aromas are not for mixing in a car, but I was pretty much dying inside. I'm so HUNGRY! Made it through the party without a single slip though, even though I, of course, was given the job of cutting the delicious looking cake. It was killer...

All-nighter, no snacks...
     It used to be, when I was up all night doing school work that by keeping a bowl of pretzels, or even vegetables for goodness sake, would help keep me going when I would not be gracing the bed with my presence that night. I can't even have a good Skinny Caramel Macchiato to keep me going.... I have a perfectly good Starbucks gift card sitting unused. :o(

Depressed....
     I'm really pretty sure that this diet actually makes me a little depressed. And I'm not talking about my silly ranting about missing Starbucks and chocolate, although that is depressing in its own right. I am referring to feeling actually depressed. I have been the most emotional person the past two weeks, I can't remember ever crying this much! I pity my husband and kids right now...

Kicker...
     Oh, and here's the kicker...this was the first morning I woke up and had lost zero pounds. I know this shouldn't matter right now, I'm only supposed to go by my weekly weight, but it's still depressing...