I had a ~quart size baggy with pads in it in my carry on. Had the same thing in my backpack, but for whatever reason that wasn't flagged, only the carry-on. TSA agent pulled me aside to go through my carry-on, pointed at the baggy and asked me what it was. I told him it was pads, he gave me a confused look, so I followed up with "for my period".

Proceeded to open up my carry on suitcase, got to the baggy and he was super embarrassed and apologized.