Forgetful or just losing it?

Did anyone become super forgetful when they were pregnant? I think my mom is losing it. Just the other night she yelled at me at 1:30am because she couldn't find the pack of diapers.. Which she told me to put in the basement just a few days prior. She keeps saying things are going missing but they are things she told me to put away.. Or that I have no idea even existed in our house. She's 8 months pregnant, due on the 8th of October and I think she is absolutely losing it, baby brain or something.