The why's, the how's, and the what's

Recently, I've started to believe that my brain has turned to mush. My sentences are shorter (not that this is any immediate sign of brain-mushiness, but...). And when I speak to people, my vocabulary is usually filled with an abundance of "that thing" or "the stuff" or "you know what I mean." I also get a funny feeling that I lose concentration in the middle of a conversation. I think it's because I feel like I've already been clear with someone. So, a typical exchange when Papa Pea calls me from work is:
P.P: How are you doing? Feeling okay? Not doing anything you shouldn't be doing?
Me (Reclining on the sofa, watching re-runs of House or Greys Anatomy, thinking about knitting more soakers, wondering who invented knitting, what position Sammy is in and how to get comfortable with it, and why Meredith on Greys Anatomy is really annoying ): I'm okay. Yup. No, I'm not doing too much (note to self: do not say a word about the laundry you just did.). (2 second silence) Oh! I got a call from the guy from, you know, that place you called yesterday to get an estimate on that thing we want? You know.
P.P.: Uh-huh. (Pause.) Ah-um...you mean, Home Depot?
Me: Yes! Yes, Home Depot! (insert satisfied smile here -- he understood!)
(Silence)
P.P.: And?
Me: Right. They said that they'd need to get the measurements from you again. Because, you know, they need to know exactly how big the...um..you know..that thing, I mean the stuff-
P.P.: Christine, use your words. You can do this.
Me (roll of the eyes, sigh. it takes so much effort!): Right.

And on it goes. I'm trying to figure this out. I'd like to be able to communicate better (just so you know, I'm having some trouble writing this post without putting "that thing" or "that stuff" in here, as well as be somewhat entertaining). I think my brain is just filled with too much of multiple things. So, I thought I might spread the wealth in this post, maybe write some of those thoughts down. Maybe this will cure my brain-mushiness! Here goes.
-Why am I waking up at 4am every morning, starving, when I go to bed barely able to breathe from dinner?
-I never realized it was possible to feel both hungry and full at the same time. Now, I know better. Why and how does this happen? Which urge should I follow?
-Why are body pillows so comfortable and what do I do when I have to turn to the other side? Do I bring the pillow with me? How do I do this discreetly at 2am without suffocating the one I love?
-Why are many knitting blogsters hating on non-knitters? If you don't knit, do you know that you are called a "muggle?" I find this annoying and it really turns me off.
-What is steeking and do I need to know about it?
-I want some Kistler Pinot Noir. Now. (This isn't a question, but it takes up a lot of brain space.)
-I want some sushi from Kabuto. Now. (Again, lots of brain space, not a question.)
-Does someone's capacity for gaseousness increase the further along they are in their pregnancy? (This is a purely THEORETICAL question, and not anything that should indicate personal experience.)
-I want to go to Kabuki Springs and sit in the sauna. This is before I drink the Kistler Pinot Noir and eat the sushi from Kabuto with Papa Pea. And wear my regular jeans that look really good on me.

There it is. I hope this thought-vomit worked. I seem to have less of an urge to say "thing." We'll see how long it lasts.