Can pregnancy really make you dumber?

Okay, so I consider myself an intelligent and confident woman (and I would hope most of you would agree). But in the last few months, I have magically become absent-minded, extremely indecisive and just plain slower at most everything. I have had the worst time choosing items to purchase for our baby, I thought once we knew the sex, it would get easier - nope. Poor Nate and my mom on the day we registered for baby gifts, I couldn't make a decision to save my life! I lost count how many times I said "I don't care, whatever you want." And now car shopping... oh my goodness. Between Nate and the salesmen, I think they want to strangle me. We have finally narrowed it down to 3 vehicles and it has been an exhausting experience so far. It does make me feel better when reading articles online or in pregnancy books that this is "normal" but it's still difficult for me. But the good news - although Nate has to deal with my forgetfulness and that I have lost the ability to make my own decisions, I have been decently pleasant during this pregnancy. So, I think Nate would take dumb over b!$%& any day!