The X which means some thing

I woke upwith an x, meaning I was trapped I am in the middle and if I run away the xwill squash me until I’m dead. I woke up in my grave dead not remembering whathappened to me before I got here .I went back to sleep in my grave rememberingwhat happened but not replaying the bit in my head what happened to me the daywhen I got the x mark. But it could of be the person who was in my grave 10 years ago who killed me and who is now with me right now.