Grocery store/weird snake creature?

Date: 8/9/2019

So I was at the grocery store with my brother buying food for us. I think we were going to stay with someone and I decided to cook for them? We got to self checkout and as I was scanning items I asked my brother if we needed more vegetables since they had a bunch of people? He said yes and then ran off to get more. Suddenly the man next to me started talking about how nice it was that I was cooking a meal, and a guy came up behind me with a stack of plates and I said, “actually I’m cooking for like 10 people.” We left the store and next thing I know I’m sitting on the toilet with the door open and the floor is covered in a layer of what appeared to be just water? There was a creature that looked like a cross between a salamander and a snake slithering around so I put my legs up and called my dad over. He told me to pour the laundry detergent that I got on it, so I did. It started drinking it. Like, loudly slurping it up. It was bizarre. The creature slithered out of the bathroom and I was yelling at my dad to kill it, but he just kinda stared at it before weakly trying to stomp on it. It got away, of course, and burrowed into the carpet.