I had a vivid dream that I was coughing up blood. I went to tell my mom about it, but when i opened my mouth to say something, I started coughing, then I looked at my hand and there was blood on it. My mom just stood there and did nothing. So I went to someone else, I can't remember who and tried to tell them I was coughing up blood and I needed to go to the ER but I opened my mouth, started coughing then there was blood on my hand again, only this time there was more.

What does this mean? I'm confused about it...