Dive or die

Date: 8/15/2016

Ok so I'm a diver but not in a normal way. I dive to save lives. Every time I successfully dive, an innocent life is spared. After a little while, I'm standing on what looks like an empty river with a massive closed door opposite me. I then hear a voice and the doors open. Water rushes in and I literally have seconds to save my life. I survive as I life myself on a metal pole high enough to avoid being submerged. I then find myself in a sewers walking around when I come before strangers. (Like i have never seen them before). Anyway we have to get something out of the river and the voice would then say it's all over. Turns out it was an missing old carriage that had a dead body in it from over 100 years ago. The ghost of this body then walks up to me, whispers 'no one can know' and submerges back into the river. That's all I can remember but just to add context. I was really ill the same night.