I have this dream and there rare like one in a blue moon rare but they happen and I think they are still happening it's a dream of me sleeping but I am conscience and I fell my blood vein or a part of my chest constrict like something was squeezing a tube but in my chest and it will go from half back to zero then back to half I never knew how to resist so I was forced to watch I was lucky it never gone over a hundred but my most recent one it did and I vividly felt like a blood jelly was squeezed into my right chest I really felt it my exact thoughts were I am going to die huh become it felt so real but I woke up and was fine I felt nothing wrong still don't