My Ability to Keep Thoughts in My Head

I have heard a lot of talk about a condition of pregnancy called "Baby Brain" or "Mommy Brain Drain" and the negative effect it has on one's ability to recall information, tap into short term memory and generally be able to formulate coherent sentences. When I was first pregnant I felt this effect right away. At one point I was so bad that a friend of mine (known to bloggers as Ultimate Chicken) actually guessed my condition based on the fact that I had lost my train of thought twice and forgotten 3 different things in the course of 10 minutes.
But then, like most dreadful side effects of Trimester 1, it disappeared. I was able to keep track of many things at once. And remember them too! Someone could ask me for something at lunch and I would be able to remember it back at my desk 30 minutes later. Amazing.
But alas, the onset of Tri 3 has reduced me once again. Today I have found my head swimming with To Do's for work, home and miscellaneous. I am currently keeping 3 separate lists. My third list is my newest, just started in the car this afternoon when I miraculously remembered that I needed dog food while I was at the bank which is NEXT TO THE PET STORE. If you can't tell from my tone, this sort of serendipity has not been happening to me lately. So I thought I'd try to run with it- was there anything else I could get to pop into my brain? The next minute of thoughts went like this: Yes! I need to write a thank you card for a baby gift, I also need to balance my bank account. And there was more... what was it... let me jot these things down anyway and start driving home, but wait- YES! I remember the third! where is that receipt scrap I have been writing on and a pen, where is my pen? shoot I just HAD it, what car is that in front of me? A new VW? I like it... Got the pen! Wait, what was it that I was writing? BLAST! It's gone. Oh, but I do want to get a hair cut, that wasn't it, but I'll write it down anyway....

I did finally remember what that missing item was, but the list is in my purse in the kitchen and I am in the living room and I cannot for the life of my remember what it was.