Half-remembered dream

We are walking down a pathway to the farm, guiding a flock of lambs. There are four or five of us.

Something comes after us. I know it without seeing it, and I scoop up one of the struggling lambs in my arms, holding it to my chest as I run to the farm. The leader of our group has done the same, and we arrive together at the pen. The farmer is looking at me, because the lamd was wet and muddy, and I have streaks of mud down the front of my white dress. I try to wipe it off.

I expect the others to be there too, but when I turn around there is no-one else. The other lambs and the rest of the group are nowhere to be seen. As myself and the leader walk back out of the pen, we see the path in front of us is submerged in water. The water is so deep it's black.

On the surface of the water two pieces of clothing are floating. I know there's something in the water, but as I turn to ask who or what, I wake up.