Preggo brain is a very real phenomenon, I can vouch for that.
When I was a resident, I was doing an H&P on a new inpatient who was somewhat demented. After I finished interviewing him, I was going over his therapy schedule for the day. He told me he was having trouble reading the schedule because he needed his glasses, but he didn't know where they were.
This happened to patients all the time. During pretty much every patient encounter, I'd end up searching for their glasses at some point. Usually they were in the bedside dresser, so I checked there first, in all the drawers. No glasses.
Then I checked the windowsill. No glasses.
I was wracking my brain to think where his glasses might be. Then the patient said, "Oh wait, I'm wearing them!"
I looked at the patient and realized that he was, indeed, wearing the glasses I had just been searching for.
"Boy, I feel dumb," he said. "I thought my glasses were lost but I was wearing them all along!"
"You feel dumb?" I retorted. "I was the one looking at you wearing your glasses."
Luckily, the patient was sufficiently confused that I don't think he was able to relate this embarrassing story to anyone else.