I Need to Vent

My cat just peed in my bed, and it got on both the duvet/comforter and the matress. I can sleep on the bed without the top matress, but I can't sleep without a duvet or blanket, and my sister is borrowing my spare duvet.

It's the middle of the night and the washing machine is already running a program.

To top it off, the fact that this even happened is making me anxious as all hell. I don't know why she did it. She had a clear line to her clean litterbox, and she's never had a problem with the sand or litterbox location before.

Did something stress her out? Is she sick? I know it's probably nothing, but this is so unusual of her and makes me really scared and paranoid that she's about to pee on something else.

Just trying really, really hard not to be mad at HER. She's just a cat.